The American electoral cycle is already reshaping the political map
American politics has only just entered the early phase of the electoral cycle for the elections on November 3, 2026, but the consequences are already visible. After this year’s first primary clashes, special elections, and the ever-longer list of senators and representatives leaving Congress, the terrain on which the battle for control of Capitol Hill will be fought is changing rapidly in Washington. This is not just an American domestic story. The composition of the future Congress will directly affect the pace and substance of United States foreign policy, including military and financial aid to allies, trade policy, tariffs, budget negotiations, and the White House’s ability to push its agenda through the legislative process.
An early signal arrived already at the beginning of March, when this year’s first primary races in states such as Texas and North Carolina opened important Senate showdowns. These elections did not provide a final answer as to who will control Congress after November, but they showed three tendencies that will likely mark the entire campaign: a strengthening battle for open seats without an incumbent officeholder, increasingly harsh intra-party confrontations, and the growing impact of decisions by individual political veterans to retire precisely at a moment when the balance of power in Washington is exceptionally tight.
Open seats as the most valuable political commodity
In the American system, incumbents traditionally have a great advantage. They have greater name recognition, an established donor network, ground organization, and campaign experience. That is why open seats, those in which the current representative or senator is no longer running, are always among the most valuable targets for both parties. In the 2026 cycle, that effect is particularly pronounced. In its updated tracking, the Associated Press states that by March 10, 2026, as many as 54 incumbent members of the House of Representatives had announced that they would not run for a new term, including 21 Democrats and 33 Republicans. AP warns that this is more than ten percent of current representatives, which is the highest share at this point in the calendar at least since the period of Barack Obama’s administration.
Such a wave of departures automatically opens space for new names, but it also increases uncertainty. The parties can no longer rely only on the strength of established members of Congress, but must rebuild local coalitions, seek candidates with enough money and political stamina, and deal with the danger of being exhausted by their own primary battles. Open seats are often also an easier target for the rival party, especially in districts or states that are not firmly aligned with one option. In practice, this means that each new retirement changes the calculations of national party committees, but also the interest of major donors, interest groups, and political action committees.
In the Senate, the effect is even more sensitive, because the number of seats up for election is smaller and each individual race carries greater weight. According to available data on the 2026 cycle, open Senate seats have appeared in a series of politically important states, including Michigan, Illinois, New Hampshire, and North Carolina, while on the Republican side openings have also emerged in states such as Alabama and Tennessee. Once the Senate map begins to fill with open races, the campaign is no longer fought only around the party base, but also around persuading independent voters that precisely that candidate is more acceptable as a new political figure.
The first electoral clashes have already revealed the tone of the campaign
The first big test came on March 4, when Texas and North Carolina opened the season of important primary contests. Analysis by the Associated Press showed that those races immediately exposed the key themes that will dominate 2026: attitudes toward Donald Trump, the question of party loyalty, deep divisions within the Republican Party, and the Democratic Party’s search for candidates who can unite the progressive part of the base and more moderate voters.
Texas thus offered a double image of American politics. On the Republican side, Senator John Cornyn failed to close out the race in the first round and ended up on the path to a runoff against Attorney General Ken Paxton. The mere fact that a long-serving senator must go into an exhausting continuation of the campaign shows how demanding the Republican electorate has become toward candidates it considers not sharp enough or not close enough to the Trumpist wing. On the Democratic side in Texas, the party was at the same time choosing the face with which it wants to test whether it can expand the map of competitiveness in a traditionally Republican state. Such races do not decide only one state, but send a signal to donors and activists about where it is worth investing energy and money.
North Carolina could be even more important. It is a state that for years has stood right on the boundary between the two parties, and the open Senate seat there arose after Republican Thom Tillis decided not to run again. AP judged already after the first elections that North Carolina in particular could be one of the decisive points for the future majority in the Senate. When an incumbent senator withdraws in such a state, the race turns into a national project: the strongest party names, enormous budgets, and the entire arsenal of political advertising enter it. At the same time, it is being tested whether Trump’s endorsement can still almost automatically bring an advantage to Republican candidates or whether in some environments a broader, less ideologically rigid message will be needed.
Special elections as an early laboratory test
Alongside the primaries, special elections for vacant seats in Congress are also attracting great attention. They are often seen as a small laboratory for voter sentiment: turnout is lower than in November, but campaign messages are clearer and media focus is greater. That is precisely why the special election in Georgia’s 14th congressional district, after Marjorie Taylor Greene’s departure, acquired broader national significance. According to AP, Republican Clay Fuller, endorsed by Donald Trump, and Democrat Shawn Harris advanced to the runoff scheduled for April 7. Although this is a strongly Republican district, the mere fact that the race is being viewed as a test of Trump’s influence shows how even seemingly safe districts have become part of a broader national story.
Special elections should not be overestimated, but they should not be underestimated either. They are the first indicator of voter mobilization, the ability to raise money, and the strength of local organization. More importantly, they can temporarily change the balance of power in the House of Representatives, where Republicans already hold a very thin majority even without that. In such circumstances, every lost seat, every resignation, and every unexpectedly close race create additional pressure on party leadership in Washington. When the majority is thin, no seat is secondary anymore.
The wave of departures also speaks of a deep change in both parties
Departures from Congress are not only a technical matter of electoral mathematics. They also reveal deeper political processes. In the Democratic Party, some of the retirements show a generational shift that has been announced for some time. For example, Senator Dick Durbin officially announced that he will not run for a new term in Illinois, with the message that the time has come to “pass the torch.” Senator Jeanne Shaheen’s decision from New Hampshire had a similar tone; back in 2025, she announced that in 2026 she would not seek a new term. In Michigan, Gary Peters also opened the door to a race without an incumbent, further complicating the Democratic defense of one of the politically key Midwestern states.
On the Republican side, the reasons are sometimes different, but the effect is similar. Some departures are connected to bids for other offices, some to fatigue with Congress, and some to pressure from an ever tougher and more ideologically homogeneous base. Thom Tillis’s decision to give up a new candidacy in North Carolina, after a public conflict with Trump, became one of the clearest examples of how internal relations in the Republican Party have become decisive even for the political survival of long-serving officials. Such dynamics also encourage other politicians to ask themselves whether it makes sense to enter another cycle in which perhaps the greater challenge is not the opposition candidate, but their own intra-party base.
The wave of departures therefore simultaneously speaks of fatigue, generational change, and a structural change in the American political system. Congress has become a place of permanent campaigning, ever rarer compromise, and almost uninterrupted polarization. In such an environment, some experienced politicians assess that there is no longer enough room for a more moderate policy, while younger candidates see an opportunity to skip the long hierarchy and enter the national arena immediately.
Why the battle for Congress matters beyond the United States
Although the primary races in Texas, Georgia, or North Carolina are above all an American story, the outcome of the battle for Congress will have a strong international impact. The House of Representatives and the Senate do not determine only domestic taxes and social programs. They decide on budgets, oversight of the executive branch, confirmation of appointments, packaging aid for allies, trade rules, and sanctions regimes. In a period of heightened global tensions and trade disputes, it is precisely the congressional majority that can accelerate or slow down key moves by the White House.
If after the 2026 elections one party takes at least one chamber of Congress from the other, the way Washington conducts foreign policy will also change. Stronger opposition control could mean more hearings, tougher oversight of spending on military aid, and more complex negotiations around new support packages for partners. On the other hand, if Republicans retain both chambers or further strengthen their position, the White House will more easily push legislative packages related to tariffs, industrial policy, energy, and security spending. In that sense, congressional elections are not any kind of add-on to presidential policy, but one of the main mechanisms that determine how far a president can go at all.
This is especially important for Europe, and for Croatia as well, because the American Congress significantly affects the transatlantic security architecture, defense budgets, aid to partners, and broader trade relations. A change of a few seats in the American Senate or House of Representatives can have consequences felt far beyond the borders of the United States, from the dynamics within NATO to the pace of decisions on sanctions, tariffs, and industrial subsidies.
The campaign will be more expensive, harsher, and less predictable
Everything indicates that 2026 will be a year of extremely expensive and harsh campaigns. Open seats almost always attract a larger number of candidates, and that means more negative advertising, more internal confrontations, and more attempts to turn local elections into a referendum on national issues. In states and districts where there is no clear favorite, this further increases the possibility of political surprises. At the same time, the more retirements there are, the fewer stable points there are on the electoral map, and the more terrain there is where one scandal, one bad debate, or one wave of dissatisfaction can change the direction of the race.
Analysts therefore pay special attention not only to “safe” and “swing” districts, but also to the way candidate lists are formed. The question is not only who is leaving, but also who is coming in their place. Will the parties choose ideologically purer candidates who better motivate the base, or will they turn to profiles that can attract independent voters? The course of events so far suggests that the answer will not be the same in all states. Where the primaries are dominantly shaped by the party base, pressure toward sharper candidates will grow. Where parties see a close general race in advance, greater emphasis will be placed on the candidate who can broaden the coalition.
That is precisely why the first phase of the 2026 cycle is already changing the political map now. Not because all the results are known, but because the terrain of competition is expanding and being reshaped almost from week to week. Every departure from Congress, every open seat, and every early electoral test changes the strategic priorities of the parties. Instead of a stable defense of existing positions, both Republicans and Democrats are increasingly entering a campaign in which they must simultaneously defend their strongholds, win new ground, and calm their own intra-party conflicts. There is enough time left until November for new surprises, but it is already clear that the future composition of Congress will not be shaped only in the final stretch of the campaign, but is being built precisely in these weeks, in a series of early races and decisions on departures that have already begun to redraw the American political map from scratch.
Sources:- - Associated Press – tracking of announced departures from the House of Representatives and data on the number of representatives who are not running again (link)
- - Associated Press – 2026 election calendar and the basic framework of the cycle in which the entire House of Representatives and part of the Senate are elected (link)
- - Associated Press – analysis of the first 2026 elections and the opening of key Senate races in Texas and North Carolina (link)
- - Associated Press – report on the special election in Georgia and the runoff between Clay Fuller and Shawn Harris (link)
- - Office of Senator Dick Durbin – official announcement that he will not run for a new term in 2026 (link)
- - Office of Senator Jeanne Shaheen – official announcement that she will not run for a new term in 2026 (link)
- - PBS NewsHour / Associated Press – report on Gary Peters’s decision not to seek a new term in Michigan (link)
- - Ballotpedia – overview of the composition of Congress and the 2026 election cycle, including the balance of power in both chambers (link)
- - Ballotpedia – overview of senators who are not running again in the 2026 cycle (link)
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