All 435 seats in the House of Representatives are up for grabs in the upcoming election, but 16 races rated as "tossups" by ABC News are expected to be particularly close and will be critical in determining which party controls the House for the 120th Congress.
Democrats need to gain at least three seats to secure a majority.
Several competitive races highlight the fight for control:
Florida
In Florida's 14th Congressional District, incumbent Democrat Kathy Castor faces a challenge from Republican Mike Beltran. The district became more competitive following a redrawing of its boundaries by the state legislature. Florida's 22nd Congressional District is an open seat with Democrat Pia Dandiya, a former teacher and U.S. Education Department official, running against Marine Corps veteran Casey Askar.
Iowa
The 2nd Congressional District in Iowa, historically Republican, is open as incumbent Ashley Hinson runs for the Senate. Democrat Lindsey James, a state representative and chaplain, is competing against lobbyist and former state representative Joe Mitchell. Trump won this district by 10 points in 2024, but economic factors have made the race tighter.
Kentucky
Republican Zach Dembo, a former federal prosecutor, and Democrat Ralph Alvarado, a physician and former state senator, are vying for Kentucky's 6th Congressional District, left open by Rep. Andy Barr's Senate bid. Redistricting has favored Republicans in this district in recent years.
Michigan
Michigan features multiple competitive races. In the 4th District, incumbent Republican Bill Huizenga faces a challenge from state Senator Sean McCann. Huizenga, in Congress since 2011, benefits from incumbency but is in a race that is tightening amid a potentially challenging environment for the president's party. The 7th District sees first-term Republican Tom Barrett, who has clashed with Trump on war powers, seeking re-election against progressive candidate William Lawrence. Trump has nonetheless campaigned for Barrett. The 10th District is an open seat with Democrat Christina Hines, a former prosecutor, running against Army veteran Mike Bouchard.
Montana
Rep. Ryan Zinke's departure from Montana's 1st Congressional District leaves an open seat. Army veteran and radio host Aaron Flint is the Republican candidate, facing union leader and firefighter Sam Forstag. Trump carried this western Montana district by nearly 12 points in 2024.
North Carolina
Incumbent Democrat Don Davis, an Air Force veteran, is in a difficult rematch against Republican Laurie Buckhout, a retired Army colonel. The district, which was redrawn, is a top Republican target, and Davis is considered among the most endangered Democratic incumbents.
New York
In New York's 17th Congressional District, Republican incumbent Mike Lawler, who has held the seat since 2022, is running against Army combat veteran Cait Conley. Lawler's district was carried by Kamala Harris in 2024.
Ohio
Ohio's 7th District features incumbent Republican Max Miller, a former Trump aide, facing union organizer Brian Poindexter. Miller has denied allegations of domestic assault. In the 9th District, long-serving Democrat Marcy Kaptur is seeking a 23rd term against real estate investor Derek Merrin. Kaptur narrowly won in 2024, even as Trump carried the district.
Pennsylvania
Incumbent Republican Rob Bresnahan, who flipped the 8th District for Republicans in 2024, is running for re-election against Scranton Mayor Paige Cognetti.
Texas
In Texas's 15th District, incumbent Republican Monica De La Cruz is seeking to hold a South Texas seat that is nearly 80% Latino. She faces Tejano singer Bobby Pulido. The 35th District is an open seat following redistricting, with Democrat Johnny Garcia, a deputy sheriff, challenging Republican Carlos De La Cruz, an Air Force veteran.
Virginia
In Virginia's 1st District, 10-term Republican Rob Wittman is being challenged by Shannon Taylor, the top prosecutor for Henrico County. This district has shown signs of trending left, with Kamala Harris outperforming Joe Biden's 2020 margin in 2024.