Competitive House Seats Disappearing, Fueling Polarization and Dysfunctional Congress

The number of politically competitive U.S. House seats has fallen significantly, a trend that experts say contributes to congressional dysfunction and increased political polarization. This shift is exemplified by North Carolina's 13th Congressional District, which transformed from a narrowly won Democratic seat in 2022 to a solidly Republican one in 2024 after state lawmakers redrew its boundaries.

In 2022, Democrat Wiley Nickel won North Carolina's 13th Congressional District by approximately 9,000 votes. Two years later, Republican Brad Knott secured the seat by over 70,000 votes. This dramatic shift occurred not due to changes in voter preference, but because the Republican-controlled state legislature redrew the district map. The legislature altered the 13th District's shape, removing Democratic voters from Raleigh and adding rural counties, thereby creating a safe Republican stronghold.

Nationally, swing seats—districts where a presidential candidate won by 5 percentage points or fewer in the previous election—are becoming increasingly rare. For decades, a combination of factors, including growing political polarization, a decrease in ticket-splitting, and residential sorting of like-minded voters, has led to the erosion of competitive districts. This trend has accelerated in recent years, with partisan redistricting efforts further reducing the number of swing seats. According to one analysis, the number of swing districts fell from 45 to 37 following recent redistricting battles.

This decrease means that the majority of House seats are effectively decided in primary elections, where candidates often appeal to the more ideologically extreme factions of their parties. Former Congressman Wiley Nickel observed that the most significant division in Congress was not between Democrats and Republicans, but between representatives from safe seats and those from competitive districts. He argued that representatives focused on winning general elections in competitive districts are more inclined to seek solutions to problems.

Organizations advocating for electoral reform estimate that a substantial majority of House representatives in 2024 were chosen by a small fraction of the nation's voters. Nick Troiano, executive director of Unite America, stated that voters have limited means to hold Congress accountable, except through a narrow band of swing districts. He anticipates that the upcoming elections, which may be the least competitive in living memory, will result in the least accountable and representative Congress.

Political strategists acknowledge the shrinking battlefield. Republicans, for instance, hope that fewer competitive seats will limit Democratic gains. The National Republican Congressional Committee characterized the situation as a "knife fight in a dark alley," highlighting the intense competition for the remaining swing seats.

Despite the overall trend, national political dynamics and voter dissatisfaction with issues like the war in Iran and high prices have opened up some Republican-leaning areas to Democratic campaigning. However, the limited number of competitive seats offers a protective buffer for Republicans. Political scientists suggest that even in a significant wave election, the number of seats changing hands would be considerably lower than in the past.

A long-standing debate exists regarding the extent to which partisan gerrymandering, compared to demographic shifts and voter self-sorting, is responsible for the decline in competitive districts. Studies suggest that without partisan gerrymandering, the House would have approximately double the current number of competitive seats. Regardless of the primary cause, the reduction in competitive districts is widely seen as a driver of polarization, as legislators become more responsive to primary voters than to the broader electorate.

Nickel, for example, chose not to seek re-election in the redrawn North Carolina district, citing data indicating that no Democratic incumbent had successfully held a seat where Donald Trump had previously secured 55% or more of the vote. Trump had received 58% in the newly drawn district. Nickel had previously championed a bill to mandate nonpartisan redistricting nationwide and briefly considered a Senate run before deciding to compete for district attorney in Wake County, a heavily Democratic area that was largely excluded from the 13th District.

The redrawing of districts reflects a broader trend of political segregation. In North Carolina, for instance, only a small percentage of voting precincts are considered politically competitive. This geographic sorting means that residents in different parts of the state can experience vastly different political environments.

In the rural counties now comprising the new 13th District, voters often express loyalty to the Republican party regardless of individual candidates. Some voters acknowledge dissatisfaction with national politics or specific figures like former President Donald Trump but indicate they will continue to vote Republican based on lifelong habit.

Paul Barringer, the Democratic nominee challenging Knott, faces an uphill battle in this heavily Republican district. Despite national Democrats identifying the seat as one to watch, local activists express skepticism about his chances. The mayor of Four Oaks, Linwood Parker, noted that gerrymandering has been a long-standing practice in North Carolina, employed by both parties when in power to maintain political advantage.