Summary: <p>Mitt Romney's choice of Paul Ryan as his running mate is already generating momentum among conservatives. But the choice also highlights divisions between the parties over spending, taxes and entitlements. The Wisconsin congressman is the architect of a plan to remake Medicare and cut trillions in federal spending. And despite the boost he brings to the GOP presidential ticket, Romney is already distancing himself from Ryan's controversial budget proposal. And President Barack Obama is now calling Ryan the ideological leader of the Republican party. Diane and her guests discuss the strengths and weaknesses of the 2012 Republican presidential ticket.</p>
