How single-party primary elections are reshaping Congress

Congress is becoming more polarized as closed single-party primaries limit voter choice and force lawmakers to cater to ideological extremes. Critics argue these primaries, controlled by parties and excluding independents, incentivize elected officials to prioritize party loyalty over policy judgment. Recent GOP primaries in Indiana, Kentucky, and Louisiana saw state and federal lawmakers ousted for opposing President Trump, particularly on redistricting efforts initiated last year. Over 90% of U.S. House seats are now considered safe for one party, meaning primaries—with far lower turnout than general elections—determine nearly all outcomes. Reform advocates like Nick Troiano of Unite America warn that partisan gerrymandering and primaries together push Congress toward greater polarization. Troiano states that independent-minded lawmakers face extinction due to primary challenges from ideological opponents. Rep. Brian Fitzpatrick, R-Pa., represents one of the few competitive districts but says Pennsylvania’s closed primary system prevents him from running as an independent. He argues the system discourages compromise, as lawmakers fear primary challenges from more extreme candidates. Fitzpatrick also supports a federal ban on partisan gerrymandering, calling the two-party system broken and unable to address nuanced policy issues. Advocates like John Opdycke of Open Primaries argue that parties now shape election outcomes before voters have a say, undermining democracy. Fitzpatrick emphasizes that all citizens should have voting rights in every election, pushing for open primaries where all voters can participate. The debate highlights broader concerns about how primary structures and gerrymandering contribute to political dysfunction in Washington.