RENEE MONTAGNE, HOST:
This is MORNING EDITION from NPR News. I'm Renee Montagne.
STEVE INSKEEP, HOST:
And I'm Steve Inskeep. Good morning.
Let's assess where the presidential race now stands. Mitt Romney made it through last night with three wins and no surprises, in Wisconsin, Maryland and Washington, D.C.
MONTAGNE: Rick Santorum won nowhere but isn't giving up. In a moment we'll ask NPR political correspondent Mara Liasson how much longer this race can go on.