“It’s Not My Job.”
To John McCain's credit, and Sarah Palin's chagrin, John McCain did correct people in the audiences of his speeches and town halls who wrongly believed that the President was a Muslim. To someone like John McCain, where integrity, honor and truth seem to matter a great deal, I suppose not doing so, and allowing such malicious disinformation that is fostered on many corners of the right to grow, was a rubicon he could not cross.
Rick Santorum has no such trouble.