The Romney campaign denies anybody from its camp said this. Regardless, it does seem that Romney is exhaling now that "tea party leaders" (Ron Johnson, Marco Rubio, Paul Ryan) have endorsed him, as if that translates into Tea Party conservatives now being on board. As Hayes writes:

Will it matter to Tea Party members that several of their most visible spokesmen have endorsed Romney? We may have a better idea from exit polls Tuesday night. Romney may well get the nomination without strong backing of rank-and-file Tea Party members, but it’s hard to imagine him getting elected without their enthusiasm. After all, it was on the strength of the Tea Party and other conservatives that Republicans won historic gains in the 2010 midterm elections.

Yes, we'll find out right here in Wisconsin tomorrow night.