WASHINGTON — Republican presidential hopeful Jon Huntsman says he'd be open to running as vice president if rival and tea party favorite Michele Bachmann wins the nomination.The former ambassador to China and ex-Utah governor says that every time he's been asked to serve his country he's answered "yes." Huntsman tells CNN interviewer Piers Morgan that if asked by the Minnesota congresswoman to run as her vice president he'd "be the first person to sign up, absolutely."Read More... More on Republican Party