Here's how Rick described Willard on "This Week" Sunday:

GOP presidential candidate Rick Santorum lambasted Mitt Romney this morning on ‘This Week,” calling him a flawed candidate and asking for a one-on-one debate with the former Massachusetts governor.

“I’d love to be able to get one-on-one with Gov. Romney and expose the record that would be the weakest record we could possibly put up against Barack Obama,” said Santorum. “We can’t nominate such a weak candidate.”

Any remaining notion that Santorum is angling for the veep slot should officially be put to rest. He's already basically called Willard a liar — and now he's saying he's unelectable.

This isn't the kind of invective you throw around when you want to be on the ticket. Ricky's clearly positioning himself for 2016.

(h/t Susie)