Kornacki considers Santorum's chances in the wake of Romney's resounding win in Illinois:
If Santorum can clear these hurdles – wins in Louisiana, Wisconsin and Pennsylvania – he’ll probably be able to justify pushing on into May, when the calendar becomes more favorable for him. He’d be even farther behind Romney in the delegate chase, but he’d still have a theoretical chance to deny his opponent 1,144. Anything short of the Louisiana/Wisconsin/Pennsylvania trifecta, though, will undermine the logic that’s keeping Santorum in the race.
Michelle Cottle imagines what it would take to push out Gingrich, a man "drunk on a cocktail of spite, narcissism, and general mischief."