A new poll from Gallup shows that in an Obama vs. McCain race 28 percent of Hillary ClintonHillary Rodham Clinton“60 Minutes” tracks how fake news spreads Ill. gov candidate runs as fresh face, despite ties to political machine Huma Abedin 'working hard' on marriage with Anthony Weiner: report MORE's supporters would vote for McCain. If the race is Clinton vs. McCain, 19 percent of Obama's supporters would jump to McCain.