District
Image
Representative
Switched party
Prior background
Birth year
Ref
Arizona 1
Ann Kirkpatrick (D )
New seat
U.S. House of Representatives [h ] Arizona House of Representatives
1950
[19 ]
Arizona 5
Matt Salmon (R )
No Open seat; replaced Jeff Flake (R )
U.S. House of Representatives [i ] Chair of the Arizona Republican Party Arizona Senate
1958
[20 ]
Arizona 9
Kyrsten Sinema (D )
New seat
Arizona Senate Arizona House of Representatives
1976
[21 ]
Arkansas 4
Tom Cotton (R )
Yes Open seat; replaced Mike Ross (D )
LawyerU.S. Army Captain
1977
[22 ]
California 1
Doug LaMalfa (R )
No Open seat; replaced Wally Herger (R )
California State Senate California State Assembly
1960
[23 ]
California 2
Jared Huffman (D )
No Open seat; replaced Lynn Woolsey (D )
California State Assembly Marin Municipal Water District
1964
[24 ]
California 7
Ami Bera (D )
Yes Defeated Dan Lungren (R )
CMO for Sacramento County Physician
1965
[25 ]
California 8
Paul Cook (R )
No Open seat; replaced Jerry Lewis (R )
California State Assembly Yucca Valley Town CouncilU.S. Marine Corps Colonel
1943
[26 ]
California 15
Eric Swalwell (D )
No Defeated Pete Stark (D )
Dublin City CouncilAlameda County deputy district attorney
1980
[27 ]
California 21
David Valadao (R )
New seat
California State Assembly
1977
[28 ]
California 26
Julia Brownley (D )
Yes Open seat; replaced Elton Gallegly (R )
California State Assembly Santa Monica–Malibu School Board
1952
[29 ]
California 29
Tony Cárdenas (D )
New seat
Los Angeles City Council California State Assembly
1963
[30 ]
California 35
Gloria Negrete McLeod (D )
No Defeated Joe Baca (D )
California State Senate California State Assembly Chaffey College Board
1941
[31 ]
California 36
Raul Ruiz (D )
Yes Defeated Mary Bono (R )
Physician
1971
[32 ]
California 41
Mark Takano (D )
New seat
Riverside Community College District Board
1960
[33 ]
California 47
Alan Lowenthal (D )
New seat
California State Senate California State Assembly Long Beach City Council
1941
[34 ]
California 51
Juan Vargas (D )
No Open seat; replaced Bob Filner (D )
California State Senate California State Assembly San Diego City Council
1961
[35 ]
California 52
Scott Peters (D )
Yes Defeated Brian Bilbray (R )
President of the San Diego City Council San Diego County deputy attorney
1958
[36 ]
Connecticut 5
Elizabeth Esty (D )
No Open seat; replaced Chris Murphy (D )
Connecticut House of Representatives Cheshire Town Council
1959
[37 ]
Florida 3
Ted Yoho (R )
No Replaced Cliff Stearns (R ), who lost renomination
Veterinarian
1955
[38 ]
Florida 6
Ron DeSantis (R )
New seat
U.S. Navy Judge Advocate General's Corps
1978
[39 ]
Florida 9
Alan Grayson (D )
New seat
U.S. House of Representatives [j ]
1958
[40 ]
Florida 18
Patrick Murphy (D )
Yes Defeated Allen West (R )
Construction executive
1983
[41 ]
Florida 19
Trey Radel (R )
No Open seat; replaced Connie Mack IV (R )
Radio talk show host
1976
[42 ]
Florida 22
Lois Frankel (D )
New seat
Mayor of West Palm Beach Florida House of Representatives
1948
[43 ]
Florida 26
Joe Garcia (D )
Yes Defeated David Rivera (R )
U.S. Department of Energy official Chair of the Florida Public Service Commission
1963
[44 ]
Georgia 9
Doug Collins (R )
New seat
Georgia House of Representatives U.S. Air Force Reserve Colonel
1966
[45 ]
Hawaii 2
Tulsi Gabbard (D )
No Open seat; replaced Mazie Hirono (D )
Honolulu City Council Hawaii House of Representatives U.S. Army Reserve Lieutenant Colonel
1981
[46 ]
Illinois 8
Tammy Duckworth (D )
Yes Defeated Joe Walsh (R )
Assistant Secretary of Veterans Affairs Illinois Director of Veterans' Affairs U.S. Army Lieutenant Colonel
1968
[47 ]
Illinois 10
Brad Schneider (D )
Yes Defeated Bob Dold (R )
Businessman
1961
[48 ]
Illinois 11
Bill Foster (D )
Yes Defeated Judy Biggert (R )
U.S. House of Representatives [k ] Physicist
1955
[49 ]
Illinois 12
William Enyart (D )
No Open seat; replaced Jerry Costello (R )
Adjutant General of Illinois U.S. Air Force Major General
1949
[50 ]
Illinois 13
Rodney Davis (R )
No Open seat; replaced Tim Johnson (R )
Staffer for U.S. Representative John Shimkus Staffer for Secretary of State George Ryan
1970
[51 ]
Illinois 17
Cheri Bustos (D )
Yes Defeated Bobby Schilling (R )
East Moline City Council Healthcare executive
1961
[52 ]
Indiana 2
Jackie Walorski (R )
Yes Open seat; replaced Joe Donnelly (D )
Indiana House of Representatives
1963
[53 ]
Indiana 5
Susan Brooks (R )
No Open seat; replaced Dan Burton (R )
U.S. Attorney for Southern Indiana
1960
[54 ]
Indiana 6
Luke Messer (R )
No Open seat; replaced Mike Pence (R )
Indiana House of Representatives
1969
[55 ]
Kentucky 6
Andy Barr (R )
Yes Defeated Ben Chandler (D )
Lawyer
1973
[56 ]
Maryland 6
John Delaney (D )
Yes Defeated Roscoe Bartlett (R )
Business owner
1963
[57 ]
Massachusetts 4
Joe Kennedy III (D )
No Open seat; replaced Barney Frank (D )
Middlesex County assistant district attorney
1980
[58 ]
Michigan 5
Dan Kildee (D )
No Open seat; replaced Dale Kildee (D )
Genesee County TreasurerGenesee County Board of Commissioners
1958
[59 ]
Michigan 11
Kerry Bentivolio (R )
No Open seat; replaced Thaddeus McCotter (R )
EducatorMichigan National Guard Sergeant First Class
1951
[60 ]
Minnesota 8
Rick Nolan (DFL)
Yes Defeated Chip Cravaack (R )
President of the Minnesota World Trade Center U.S. House of Representatives [l ] Minnesota House of Representatives
1943
[61 ]
Missouri 2
Ann Wagner (R )
No Open seat; replaced Todd Akin (R )
U.S. Ambassador to Luxembourg Co-chair of the Republican National Committee Chair of the Missouri Republican Party
1962
[62 ]
Montana at-large
Steve Daines (R )
No Open seat; replaced Denny Rehberg (R )
Businessman
1962
[63 ]
Nevada 1
Dina Titus (D )
No Open seat; replaced Shelley Berkley (D )
U.S. House of Representatives [m ] Nevada Senate Political science professor
1950
[64 ]
Nevada 4
Steven Horsford (D )
New seat
Nevada Senate
1973
[65 ]
New Hampshire 1
Carol Shea-Porter (D )
Yes Defeated Frank Guinta (R )
U.S. House of Representatives [n ]
1952
[66 ]
New Hampshire 2
Annie Kuster (D )
Yes Defeated Charles Bass (R )
Attorney
1956
[67 ]
New Mexico 1
Michelle Lujan Grisham (D )
No Open seat; replaced Martin Heinrich (D )
New Mexico Secretary of Health New Mexico Secretary of Aging
1959
[68 ]
New York 6
Grace Meng (D )
No Open seat; replaced Gary Ackerman (D )
New York State Assembly
1975
[69 ]
New York 8
Hakeem Jeffries (D )
No Open seat; replaced Edolphus Towns (D )
New York State Assembly
1970
[70 ]
New York 18
Sean Patrick Maloney (D )
Yes Defeated Nan Hayworth (R )
White House Staff Secretary COO of Klodex
1966
[71 ]
New York 24
Dan Maffei (D )
Yes Defeated Ann Marie Buerkle (R )
U.S. House of Representatives [o ] Congressional staffer
1968
[72 ]
New York 27
Chris Collins (R )
Yes Defeated Kathy Hochul (D )
Erie County Executive
1950
[73 ]
North Carolina 8
Richard Hudson (R )
Yes Defeated Larry Kissell (D )
Congressional staffer
1971
[74 ]
North Carolina 9
Robert Pittenger (R )
No Open seat; replaced Sue Myrick (R )
North Carolina Senate
1948
[75 ]
North Carolina 11
Mark Meadows (R )
Yes Open seat; replaced Heath Shuler (D )
Real estate developer
1959
[76 ]
North Carolina 13
George Holding (R )
Yes Open seat; replaced Brad Miller (D )
U.S. Attorney for Eastern North Carolina Assistant U.S. Attorney
1968
[77 ]
North Dakota at-large
Kevin Cramer (R )
No Open seat; replaced Rick Berg (R )
North Dakota Public Service Commission Chair of the North Dakota Republican Party
1961
[78 ]
Ohio 2
Brad Wenstrup (R )
No Replaced Jean Schmidt (R ), who lost renomination
Podiatric physicianU.S. Army Reserve Colonel
1958
[79 ]
Ohio 3
Joyce Beatty (D )
New seat
Senior vice president of Ohio State University Ohio House of Representatives
1950
[80 ]
Ohio 14
David Joyce (R )
No Open seat; replaced Steve LaTourette (R )
Geauga County Prosecutor
1957
[81 ]
Oklahoma 1
Jim Bridenstine (R )
No Replaced John Sullivan (R ), who lost renomination
U.S. Navy Lieutenant Commander
1975
[82 ]
Oklahoma 2
Markwayne Mullin (R )
Yes Open seat; replaced Dan Boren (D )
Plumbing business owner Mixed martial artist
1977
[83 ]
Pennsylvania 4
Scott Perry (R )
No Open seat; replaced Todd Platts (R )
Pennsylvania House of Representatives Pennsylvania National Guard Brigadier General
1962
[84 ]
Pennsylvania 12
Keith Rothfus (R )
Yes Defeated Mark Critz (D )
Director of the OFBCI U.S. Department of Homeland Security official
1962
[85 ]
Pennsylvania 17
Matt Cartwright (D )
No Replaced Tim Holden (D ), who lost renomination
Lawyer
1961
[86 ]
South Carolina 7
Tom Rice (R )
New seat
Horry County Council
1957
[87 ]
Texas 14
Randy Weber (R )
No Open seat; replaced Ron Paul (R )
Texas House of Representatives Pearland City Council
1953
[88 ]
Texas 16
Beto O'Rourke (D )
No Replaced Silvestre Reyes (D ), who lost renomination
El Paso City Council
1972
[89 ]
Texas 20
Joaquin Castro (D )
No Open seat; replaced Charlie Gonzalez (D )
Texas House of Representatives
1974
[90 ]
Texas 23
Pete Gallego (D )
Yes Defeated Quico Canseco (R )
Texas House of Representatives
1961
[91 ]
Texas 25
Roger Williams (R )
New seat
Secretary of State of Texas Car dealership owner College baseball coach
1949
[92 ]
Texas 33
Marc Veasey (D )
New seat
Texas House of Representatives
1971
[93 ]
Texas 34
Filemon Vela Jr. (D )
New seat
Civil attorney
1963
[94 ]
Texas 36
Steve Stockman (R )
New seat
U.S. House of Representatives [p ]
1956
[95 ]
Utah 2
Chris Stewart (R )
New seat
Business executiveU.S. Air Force Major
1960
[96 ]
Washington 6
Derek Kilmer (D )
No Open seat; replaced Norm Dicks (D )
Washington State Senate Washington House of Representatives
1974
[97 ]
Washington 10
Denny Heck (D )
New seat
Washington House of Representatives
1952
[98 ]
Wisconsin 2
Mark Pocan (D )
No Open seat; replaced Tammy Baldwin (D )
Wisconsin State Assembly Dane County Board of Supervisors
1964
[99 ]