Mitt Romney
Massachusetts

Mike Huckabee
​Arkansas

Scott Walker
​Wisconsin

Jeb Bush
​Florida

Bobby Jindal
​Louisiana

John Kasich
​Ohio

Nikki Haley
​South Carolina

Bruce Rauner
​Illinois

Brian Sandoval
Nevada

Martin O'Malley
​Maryland

Lincoln Chafee
Rhode Island

George Pataki
New York