District Image Representative Switched party Prior background Birth year Ref Alabama 6 Gary Palmer (R) No Open seat; replaced Spencer Bachus (R) President of the Alabama Policy Institute President of the State Policy Network 1954 [ 15] Arizona 2 Martha McSally (R) Yes Defeated Ron Barber (D) U.S. Air Force Colonel 1966 [ 16] Arizona 7 Ruben Gallego (D) No Open seat; replaced Ed Pastor (D) Arizona House of Representatives U.S. Marine Corps Reserve Corporal 1979 [ 17] Arkansas 2 French Hill (R) No Open seat; replaced Tim Griffin (R) Secretary to the National Economic Council Deputy Assistant Secretary of the Treasury Aide to U.S. Senator John Tower 1956 [ 18] Arkansas 4 Bruce Westerman (R) No Open seat; replaced Tom Cotton (R) Majority Leader of the Arkansas House of Representatives Fountain Lake School Board 1967 [ 19] California 11 Mark DeSaulnier (D) No Open seat; replaced George Miller (D) California State Senate California State Assembly Contra Costa County Board of Supervisors Concord City Council 1952 [ 20] California 25 Steve Knight (R) No Open seat; replaced Buck McKeon (R) California State Senate California State Assembly Palmdale City Council Los Angeles Police Department U.S. Army Reserve 1966 [ 21] California 31 Pete Aguilar (D) Yes Open seat; replaced Gary Miller (R) Mayor of Redlands Aide to Governor Gray Davis 1979 [ 22] California 33 Ted Lieu (D) No Open seat; replaced Henry Waxman (D) California State Senate California State Assembly Torrance City Council U.S. Air Force JAG Corps Colonel 1969 [ 23] California 35 Norma Torres (D) No Open seat; replaced Gloria Negrete McLeod (D) California State Senate California State Assembly Mayor of Pomona 1965 [ 24] California 45 Mimi Walters (R) No Open seat; replaced John Campbell (R) California State Senate California State Assembly Laguna Niguel City Council 1962 [ 25] Colorado 4 Ken Buck (R) No Open seat; replaced Cory Gardner (R) Weld County District Attorney Congressional staffer 1959 [ 26] Florida 2 Gwen Graham (D) Yes Defeated Steve Southerland (R) Lawyer 1963 [ 27] Florida 26 Carlos Curbelo (R) Yes Defeated Joe Garcia (D) Miami-Dade County Public School Board Staffer for U.S. Senator George LeMieux 1980 [ 28] Georgia 1 Buddy Carter (R) No Open seat; replaced Jack Kingston (R) Georgia State Senate Georgia House of Representatives Mayor of Pooler Pooler City Council 1957 [ 29] Georgia 10 Jody Hice (R) No Open seat; replaced Paul Broun (R) Senior pastor 1960 [ 30] Georgia 11 Barry Loudermilk (R) No Open seat; replaced Phil Gingrey (R) Georgia State Senate Georgia House of Representatives Chair of the Bartow County Republican Party U.S. Air Force 1963 [ 31] Georgia 12 Rick Allen (R) Yes Defeated John Barrow (D) Construction business owner 1951 [ 32] Hawaii 1 Mark Takai (D) No Open seat; replaced Colleen Hanabusa (D) Hawaii House of Representatives Hawaii National Guard Lieutenant Colonel 1967 [ 33] Illinois 10 Bob Dold (R) Yes Defeated Brad Schneider (D) U.S. House of Representatives [ h] Staffer for Vice President Dan Quayle 1969 [ 34] Illinois 12 Mike Bost (R) Yes Defeated William Enyart (D) Illinois House of Representatives Murphysboro Township Treasurer U.S. Marine Corps 1960 [ 35] Iowa 1 Rod Blum (R) Yes Open seat; replaced Bruce Braley (D) Software business executive 1955 [ 36] Iowa 3 David Young (R) No Open seat; replaced Tom Latham (R) Chief of staff for U.S. Senator Chuck Grassley Chief of staff for U.S. Senator Jim Bunning 1968 [ 37] Louisiana 5 Ralph Abraham (R) No Defeated Vance McAllister (R) Aviation medical examiner Mississippi National Guard 1954 [ 38] Louisiana 6 Garret Graves (R) No Open seat; replaced Bill Cassidy (R) Chair of the Louisiana CPRA Staffer for U.S. Senator David Vitter Staffer for U.S. Senator John Breaux 1972 [ 39] Maine 2 Bruce Poliquin (R) Yes Open seat; replaced Mike Michaud (D) Maine State Treasurer 1953 [ 40] Massachusetts 6 Seth Moulton (D) No Defeated John F. Tierney (D) in a primary U.S. Marine Corps Captain 1978 [ 41] Michigan 4 John Moolenaar (R) No Open seat; replaced Dave Camp (R) Michigan Senate Michigan House of Representatives Midland City Council 1961 [ 42] Michigan 8 Mike Bishop (R) No Open seat; replaced Mike Rogers (R) Majority Leader of the Michigan Senate Michigan House of Representatives 1967 [ 43] Michigan 11 Dave Trott (R) No Defeated Kerry Bentivolio (R) in a primary Bingham Farms Village Council Business owner 1960 [ 44] Michigan 12 Debbie Dingell (D) No Open seat; replaced John Dingell (D) Wayne State University Board of Governors 1953 [ 45] Michigan 14 Brenda Lawrence (D) No Open seat; replaced Gary Peters (D) Mayor of Southfield Southfield City Council U.S. Postal Service 1954 [ 46] Minnesota 6 Tom Emmer (R) No Open seat; replaced Michele Bachmann (R) Minnesota House of Representatives Delano City Council Independence City Council 1961 [ 47] Montana at-large Ryan Zinke (R) No Open seat; replaced Steve Daines (R) Montana Senate U.S. Navy SEAL Team Six 1961 [ 48] Nebraska 2 Brad Ashford (D) Yes Defeated Lee Terry (D) Nebraska Legislature CEO of the Omaha Housing Authority Nebraska Department of Education 1949 [ 49] Nevada 4 Cresent Hardy (R) Yes Defeated Steven Horsford (D) Nevada Assembly Mesquite City Council 1957 [ 50] New Hampshire 1 Frank Guinta (R) Yes Defeated Carol Shea-Porter (D) U.S. House of Representatives [ i] Mayor of Manchester Manchester Board of Aldermen New Hampshire House of Representatives 1970 [ 51] New Jersey 3 Tom MacArthur (R) No Open seat; replaced Jon Runyan (R) Mayor of Randolph 1960 [ 52] New Jersey 12 Bonnie Watson Coleman (D) No Open seat; replaced Rush Holt Jr. (D) Majority Leader of the New Jersey General Assembly Chair of the New Jersey Democratic State Committee 1945 [ 53] New York 1 Lee Zeldin (R) Yes Defeated Tim Bishop (D) New York State Senate U.S. Army Lieutenant Colonel 1980 [ 54] New York 4 Kathleen Rice (D) No Open seat; replaced Carolyn McCarthy (D) Nassau County District Attorney 1965 [ 55] New York 21 Elise Stefanik (R) Yes Open seat; replaced Bill Owens (D) Staffer for the U.S. Domestic Policy Council Campaign manager 1984 [ 56] New York 24 John Katko (R) Yes Defeated Dan Maffei (D) Assistant U.S. Attorney U.S. Securities and Exchange Commission 1962 [ 57] North Carolina 6 Mark Walker (R) No Open seat; replaced Howard Coble (R) Businessman 1969 [ 58] North Carolina 7 David Rouzer (R) Yes Open seat; replaced Mike McIntyre (D) North Carolina Senate Legislative aide to U.S. Senator Elizabeth Dole 1972 [ 59] Oklahoma 5 Steve Russell (R) No Open seat; replaced James Lankford (R) Oklahoma Senate U.S. Army Lieutenant Colonel 1963 [ 60] Pennsylvania 6 Ryan Costello (R) No Open seat; replaced Jim Gerlach (R) Chester County Board of Commissioners Chester County Recorder of Deeds 1976 [ 61] Pennsylvania 13 Brendan Boyle (D) No Open seat; replaced Allyson Schwartz (D) Pennsylvania House of Representatives 1977 [ 62] Texas 4 John Ratcliffe (R) No Defeated Ralph Hall (R) in a primary Mayor of Heath U.S. Attorney for Eastern Texas 1965 [ 63] Texas 23 Will Hurd (R) Yes Defeated Pete Gallego (D) CIA Directorate of Operations 1977 [ 64] Texas 36 Brian Babin (R) No Open seat; replaced Steve Stockman (R) Lower Neches Valley Authority Texas Historical Commission Mayor of Woodville U.S. Air Force 1948 [ 65] Utah 4 Mia Love (R) Yes Open seat; replaced Jim Matheson (D) Mayor of Saratoga Springs Saratoga Springs City Council 1975 [ 66] Virginia 8 Don Beyer (D) No Open seat; replaced Jim Moran (D) U.S. Ambassador to Switzerland and Liechtenstein Lieutenant Governor of Virginia 1950 [ 67] Virginia 10 Barbara Comstock (R) No Open seat; replaced Frank Wolf (R) Virginia House of Delegates U.S. Department of Justice official Congressional staffer 1959 [ 68] Washington 4 Dan Newhouse (R) No Open seat; replaced Doc Hastings (R) Washington Director of Agriculture Washington House of Representatives 1955 [ 69] West Virginia 2 Alex Mooney (R) No Open seat; replaced Shelley Moore Capito (R) Chair of the Maryland Republican Party Maryland Senate 1971 [ 70] West Virginia 3 Evan Jenkins (R) Yes Defeated Nick Rahall (D) West Virginia Senate West Virginia House of Delegates 1960 [ 71] Wisconsin 6 Glenn Grothman (R) No Open seat; replaced Tom Petri (R) Wisconsin Senate Wisconsin State Assembly 1955 [ 72]