Sunday morning reads
GOP Veep Sheet: McCain ponders Powell -- PoliticoSkip to next paragraph
As Iowa's Kent Sorenson jumps to Ron Paul ship, rat analogies abound
Could Romney 'train' be derailed by Gingrich? Perry? Someone new?
Virginia primary: Was it so hard for Perry and Gingrich to get on the ballot?
Donald Trump as third-party candidate: Will he woo Americans Elect?
Ron Paul: why racist newsletter flap could hurt him in Iowa
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For Senator Biden, another comeback -- Washington Post
Biden jokes about wife Jill? OK with Pelosi -- LA Times
On Obama-Biden chemistry, clues are scarce -- NY Times
Those fretting over size of Obama's lead should relax -- San Diego Union Tribune
Is Biden the new Cheney? -- LA Times