The candidates supported here are all challenging Republicans who unendorsed Trump on or after October 7, 2016:
John McCain (challenged by Ann Kirkpatrick), Kelly Ayotte (challenged by Maggie Hassan), Joe Heck (challenged by Catherine Cortez Masto), Rob Portman (challenged by Ted Strickland), John Thune (challenged by Jay Williams), Brian Fitzpatrick (challenged by Steve Santarsiero), Cresent Hardy (challenged by Ruben Kihuen), Mike Coffman (challenged by Morgan Carroll), Mia Love (challenged by Doug Owens), Steve Knight (challenged by Brian Caforio), Erik Paulsen (challenged by Terri Bonoff), Scott Garrett (challenged by Josh Gottheimer), Barbara Comstock (challenged by LuAnn Bennett), Jason Chaffetz (challenged by Stephen Tryon), Ann Wagner (challenged by Bill Otto), Rodney Davis (challenged by Mark Wicklund), Mike Crapo (challenged by Jerry Sturgill), and Gary Herbert (challenged by Mike Weinholtz).