As a result of redistricting, many incumbents were forced to compete against each other in the same district, which resulted in a larger number of incumbents being defeated in primaries.
In primary elections Thirteen representatives lost renomination: eight were lost in redistricting battles pitting incumbents against each other, and five incumbents lost nomination to non-incumbent challengers.
Democrats Seven Democrats lost renomination: five in redistricting and two to a non-incumbent challenger.
Seat held by a Democrat These primary winners later won the general election. • :
Hansen Clarke lost a redistricting race to fellow incumbent
Gary Peters • :
Russ Carnahan lost a redistricting race to fellow incumbent
Lacy Clay • :
Steve Rothman lost a redistricting race to fellow incumbent
Bill Pascrell • :
Dennis Kucinich lost a redistricting race to fellow incumbent
Marcy Kaptur • :
Tim Holden lost to challenger
Matt Cartwright Seat lost to a Republican • :
Jason Altmire lost a redistricting race to fellow incumbent
Mark Critz, who later lost the general election
Republicans Six Republicans lost renomination: three in redistricting races and three to a non-incumbent challenger. All the seats were held by Republicans. • :
Ben Quayle lost a redistricting race to fellow incumbent
David Schweikert • :
Cliff Stearns lost to challenger
Ted Yoho • :
Sandy Adams lost a redistricting race to fellow incumbent
John Mica • :
Don Manzullo lost a redistricting race to fellow incumbent
Adam Kinzinger • :
Jean Schmidt lost to challenger
Brad Wenstrup • :
John Sullivan lost to challenger
Jim Bridenstine In general elections Democrats Ten incumbent Democrats lost re-election; four to fellow Democrats and six to Republicans. Four losses were in California: two due to redistricting putting two incumbents together (resulting in a net loss of two for the Democrats) and two due to the state's
top two primary. Two incumbents outside of California lost to Republican incumbents after being redistricted to the same district.
Seat held by a Democrat • :
Pete Stark lost to
Eric Swalwell • :
Howard Berman lost a redistricting race to fellow incumbent
Brad Sherman • :
Joe Baca lost to
Gloria Negrete McLeod • :
Laura Richardson lost a redistricting race to fellow incumbent
Janice Hahn Seat lost to a Republican incumbent • :
Leonard Boswell lost a redistricting race to
Tom Latham • :
Betty Sutton lost a redistricting race to
Jim Renacci Seat lost to a Republican challenger • :
Ben Chandler lost to
Andy Barr. • :
Kathy Hochul lost to
Chris Collins. • :
Larry Kissell lost to
Richard Hudson. • :
Mark Critz lost to
Keith Rothfus.
Republicans Seventeen incumbent Republicans lost re-election.
Seat held by a Republican One incumbent Republican lost re-election to a fellow incumbent Republican. • :
Jeff Landry lost to
Charles Boustany Seat lost to a Democratic challenger Sixteen incumbent Republicans, ten of whom were first elected in 2010, lost re-election to Democrats. • :
Dan Lungren lost to
Ami Bera. • :
Mary Bono Mack lost to
Raul Ruiz. • :
Brian Bilbray lost to
Scott Peters. • :
Allen West lost to
Patrick Murphy. • :
David Rivera lost to
Joe Garcia. • :
Joe Walsh lost to
Tammy Duckworth. • :
Robert Dold lost to
Brad Schneider. • :
Judy Biggert lost to
Bill Foster. • :
Bobby Schilling lost to
Cheri Bustos. • :
Roscoe Bartlett lost to
John K. Delaney. • :
Chip Cravaack lost to
Rick Nolan. • :
Frank Guinta lost to
Carol Shea-Porter. • :
Charles Bass lost to
Ann Kuster. • :
Nan Hayworth lost to
Sean Patrick Maloney. • :
Ann Marie Buerkle lost to
Dan Maffei. • :
Quico Canseco lost to
Pete Gallego. == Reapportionment ==