After going 0-for-3 in Tuesday's presidential primaries, a defiant Rick Santorum dismissed calls to drop out and predicted he'll win the next contest in his home state of Pennsylvania on April 24.

He'll have to — and not because it would put the former Pennsylvania senator on a path to defeat front-runner Mitt Romney, who has been racking up delegates and is increasingly seen as the inevitable nominee.

A loss in Pennsylvania, where recent polls show Santorum is weakening, would "destroy the rationale for him continuing," says Pennsylvania pollster G. Terry Madonna.

• 95th Day of 2012 / 271 Remaining
• 77 Days Until Summer Begins

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• Moon’s Phase: 94 %

• The Next Full Moon
• April 6 @ 2:20pm
• Full Pink Moon

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RENEE MONTAGNE, HOST:

Good morning. I'm Renee Montagne with an early Easter for the dogs of Edmond, Oklahoma. The city's parks and recreation department hosted an Easter egg hunt for dogs. The Daily Oklahoman reports that over 70 dogs took part in the first ever Hound Hunt, sniffing out more than 700 treat-filled plastic eggs, including two silver eggs as grand prizes. One canine contestant went all out, donning a pair of plush rabbit ears for the occasion. It's MORNING EDITION. Transcript provided by NPR, Copyright National Public Radio.

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Looking not just to win the NCAA Division I women's basketball championship, but also to be the first team to win 40 games in one season and to do it without a single loss on the way, the Baylor Lady Bears achieved all that last night with an 80-61 win over Notre Dame.

His wins Tuesday in Washington, D.C., Maryland and — most importantly — in Wisconsin has produced a subtle shift in the way Republican presidential contender Mitt Romney is being referred to by the news media.

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STEVE INSKEEP, HOST:

It's MORNING EDITION, from NPR News. Good morning. I'm Steve Inskeep.

RENEE MONTAGNE, HOST:

And I'm Renee Montagne.

A flight departure board at the Dallas-Fort Worth Airport yesterday told the story. One word was repeated again and again: cancelled, cancelled, cancelled.

INSKEEP: That was just one sign of chaos, as up to a dozen tornadoes spun through the area. Amazingly, nobody was reported killed.

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RENEE MONTAGNE, HOST:

And this weekend Nokia rolls out its newest smartphone to the American public. It's called the Lumia 900. Nokia is trying to break its way back into the high-end mobile phone market it once dominated. In this fight against Apple iPhone and Google's Android, Nokia is the underdog now.

And as NPR's Steve Henn reports, it has joined up with Microsoft in its bid to make a comeback.