Rick Santorum swept three nominating contests held Tuesday evening, upsetting frontrunner Mitt Romney and injecting new energy into the former Pennsylvania senator's campaign.

NBC’s Chuck Todd tells TODAY’s Ann Curry that Rick Santorum’s sweep of Tuesday’s GOP presidential contests was a “rejection by conservatives of Mitt Romney.” (TODAY)

Emergency calls placed in the minutes after Josh Powell killed his two young sons were released Tuesday, including one from the "traumatized" social worker outside the house.

Police in Washington state released a 911 call placed by the social worker who dropped Josh Powell’s two young sons off before he murdered them and took his own life in a house fire. NBC’s Miguel Almaguer reports. (TODAY)

Bombardment of the Syrian city of Homs by government forces killed at least 47 civilians in the first eight hours of Wednesday, activists in the city and opposition sources said.

First Read: Santorum’s three-state victory Tuesday put Romney’s on-again, off-again frontrunner status back on center stage.

Rick Santorum swept three nominating contests held Tuesday evening, upsetting frontrunner Mitt Romney and injecting new energy into the former Pennsylvania senator's campaign.

House Republicans have introduced their version of a bill to ban insider trading by thousands of federal officials, and have added provisions to bar lawmakers convicted of a felony from collecting their government pensions.

First Read: Contests in Colorado, Minnesota and Missouri offer the former Pennsylvania senator an opportunity break through once more.

Some congressional Democrats were working behind the scenes Tuesday to persuade Obama to reverse course; some warned of a potential threat to the president’s re-election chances in states with large Catholic populations.

Jimmy Fallon perhaps unwisely took on Michelle Obama at the White House in several exercise competitions, while Jimmy Kimmel pointed out Mitt Romney's loose approach to facts.

For a wounded soldier home from Afghanistan, it was a special reunion a long time in the making. A puppy he adopted on the front lines is now with him again.

On New Year’s Day, teenage prodigy Samantha Garvey and her family moved into a homeless shelter on Long Island, wondering what the future might hold after being evicted from their home.

One 21-year-old Florida waitress has no plans to quit her day job – even after winning a $1 million lottery prize.

A military veteran in need of a kidney transplant had $14.3 million sitting on a table in his house and didn't know it.

Some quick-thinking Good Samaritans were lifesavers for a Texas family whose small seaplane crashed into the Caribbean.