Not seeking re-election. UPDATED
[Senate]
Bob Corker - Republican
Jeff Flake - Republican
Orrin Hatch - Republican
No Name - Republican [Departure Soon]
[House]
Bill Shuster - Republican
Bob Goodlatte - Republican
Carol Shea-Porter - Democrat
Charles W. Dent - Republican
Chris Collins - Republican (charged with taking part in an insider trading scheme)
Darrell Issa - Republican
Dave Reichert - Republican
David Trott - Republican
Dennis Ross - Republican
Edward Royce - Republican
Elizabeth Esty - Democrat
Frank LoBiondo - Republican
Gene Green - Democrat
Gregg Harper - Republican
Ileana Ros-Lehtinen - Republican
Jeb Hensarling - Republican
Jim Bridenstine - Republican
Joe Barton - Republican
John Delaney - Democrat
John J. Duncan, Jr. - Republican
Lamar Smith - Republican
Luis V. Gutierrez - Democrat
Luther Strange - Republican (lost the special primary election earlier this year to Roy Moore.)
Lynn Jenkins - Republican
Niki Tsongas - Democrat
Paul Ryan - Republican
Rick Nolan - Democrat
Robert Brady - Democrat
Robert Pittenger - Republican (lost the Republican primary for re-election)
Rodney Frelinghuysen - Republican
Ruben J. Kihuen - Democrat
Ryan Costello - Republican
Sam Johnson - Republican
Sandy Levin - Democrat
Ted Poe - Republican
Tom Garrett - Republican (he'll no longer seek re-election, saying he needs to work on recovering from alcoholism and renewing his commitment to his family.)
Thomas Rooney - Republican
Trey Gowdy - Republican