After another set of presidential contests the story remains much the same — pundits say former Massachusetts Gov. Mitt Romney remains the front runner in the race for the 2012 Republican presidential nomination, but former Pennsylvania Sen. Rick Santorum continues his strong challenge.

It is time for the much-winnowed field of Republican presidential contenders to shrink a little further. It is time for Newt Gingrich to bid adieu and wrap up his bid for the nomination.

Rick Santorum, who won the Alabama and Mississippi primaries on Tuesday, has proven himself the conservatives' favored alternative to front-runner Mitt Romney. He did this by winning the voters who mattered most in the deep-dyed red states of Alabama and Mississippi, the white evangelical "born again" voters who cast more than two-thirds of the vote in each state.

Wal-Mart announced an online video partnership with most of the major Hollywood movie studios on Tuesday. The idea is to make it easier for people to legally watch and share movies digitally.

On Tuesday, President Obama received the endorsement of the nation's largest organized labor organization, the AFL-CIO. Collective bargaining has been under attack in several states, which has drained union resources. But labor leaders say that's made them more determined than ever to keep Obama in the White House.

Even as the job market is improving and other indicators are positive, the Federal Reserve wants to keep interest rates super low until 2014. The Fed reaffirmed that policy Tuesday. That's likely because the economy is still growing slowly — not nearly fast enough to sustain consistent, long-term job creation.

It was a big night for Republican presidential candidate Rick Santorum. He won the primaries in Mississippi and Alabama. Mitt Romney was running third in both states.

Far right politician Marine Le Pen is officially in the French presidential race after getting the required 500 mayors' signatures to appear on the ballot. She launched her campaign in a small town in the north of France, a poor region where many see globalization and immigration as France's biggest problems.

British Prime Minister David Cameron is in Washington for talks with President Obama. British Ambassador to the U.S. Peter Westmacott talks to Steve Inskeep about what's likely to dominate the agenda of the two leaders: Afghanistan.

The Senate is on the verge of passing a highway bill. It would spend more than $100 billion on the nation's roads in two years. The bill is expected to pass with bi-partisan support. But it's had an unusual and controversial path.

Just off the side of the road in rural southern Texas is a large beige building that looks a lot like a prison. Fences and tall walls mark the outside. Inside, the doors slam and people sit in control booths at the end of long concrete hallways.

But just a little farther into the facility, the door opens to a courtyard in the center of the complex, and there, things begin to change. There's a soccer field, a pavilion and a gymnasium. There's also a walk-up pharmacy and commissary. All of it is guarded by officers in polo shirts.