Mara Liasson

With nominating contests in four more states on Tuesday, Ted Cruz is hoping to emerge as the one viable challenger to Donald Trump for the Republican nomination for president.

The GOP may be in the midst of an identity crisis, but the Democratic Party is also facing a political crisis that could be made a lot worse if it doesn't win the White House in November.

Here's why:

Part of President Obama's legacy is the health of his party. ...

GOP presidential candidates debated in Detroit. Michigan's primary is on Tuesday. The debate was one of the last chances Ted Cruz and Marco Rubio had to slow Donald Trumps march to the nomination.

It was day of strong words on the campaign trail after former GOP presidential nominee Mitt Romney delivered a speech that was highly critical of front-runner Donald Trump.

The stakes in the November election are higher for Democrats than Republicans. Democrats currently hold fewer elected offices nationwide than at any time since the 1920s, and the Obama years have decimated the party's bench.

After Wednesday night's contests, Donald Trump and Hillary Clinton have firmed up their front-runner status in the GOP and Democratic presidential contests.

Donald Trump keeps on winning and confounding the Republican Party establishment with his broad coalition of voters. He won seven states on Super Tuesday. Hillary Clinton also won seven.

On the Republican side, Donald Trump is projected to win in Georgia. For the Democrats, Hillary Clinton takes Georgia and Virginia, while Bernie Sanders won in his home state of Vermont.

Polls begin to close in about a dozen states voting in the Super Tuesday primaries.

There is more at stake Tuesday than at any other point of the presidential primary season. About a dozen states are voting, with Republican Donald Trump and Democrat Hillary Clinton favored in many.

Republican caucus goers in Nevada overwhelming voted for Donald Trump Tuesday night to be the party's presidential nominee. It's Trump's third major victory in two weeks.

In any ordinary year, Donald Trump's big win in South Carolina on Saturday night would all but anoint him the Republican presidential nominee. That's especially true after his big win in New Hampshire, where he won with support across various age and income groups in the party.

Trump should be ...

In any typical year, a Republican who won in New Hampshire and South Carolina would be considered a shoo-in for the nomination. But 2016 is no ordinary year, and Donald Trump is no ordinary candidate.

Coming off a dramatic weekend, the campaigns move on this week to Republican caucuses in Nevada and a Democratic primary in South Carolina. Jeb Bush dropped out of the race after the S.C. primary.

Another big caucus day and primary night on Saturday, when Democrats go to their caucus sites in Nevada, and Republicans go to the polls in South Carolina. Here are five things we'll learn from the results:

1. Is insulting the Bush family — and getting into a fight with the ...

Antonin Scalia's body wasn't cold before his seat on the U.S. Supreme Court became tangled up in partisan politics. Here are five ways Scalia's death is complicating the 2016 election.

1. Obama looms even larger: After two terms, this election was always going to be a referendum on the Obama ...

Supreme Court Justice Antonin Scalia's death uprooted the presidential election and jogged memories that Barack Obama is a lame-duck president. Republicans are vowing to block any Obama nominee.

NPR's political correspondent Mara Liasson gives a preview of tonight's high-stakes Republican debate in South Carolina.

After Bernie Sanders' N.H.primary win, he was reaching out to minority voters who make up a larger segment of the electorate in upcoming contests. Hillary Clinton was trying to regain her footing.

NPR looks at the state of the Democratic presidential race after Bernie Sanders' decisive victory over Hillary Clinton in the New Hampshire primary.