Ron Paul

Republican

Opponents (Received at least 1% of vote)

Gary Johnson

Libertarian • 2012 General

Rick Santorum

Republican • 2012 Republican Primary

Newt Gingrich

Republican • 2012 Republican Primary

Barack Obama

Democratic • 2008 General

John McCain

Republican • 2008 Republican Primary

Mitt Romney

Republican • 2008 Republican Primary

Mike Huckabee

Republican • 2008 Republican Primary

Rudy Giuliani

Republican • 2008 Republican Primary

Fred Thompson

Republican • 2008 Republican Primary