It's the day when the most states vote and the most delegates are at stake. It can be determinative in who becomes the presidential nominee for either party.
We took a sample of the most novel economic proposals and asked a panel of economists: Are they good or bad?
"I will absolutely give my return, but I'm being audited now for two or three years, so I can't do it until the audit is finished, obviously," Donald Trump said this week.
Bernie Sanders and Hillary Clinton are both trying to explain their positions on the 1994 crime bill, a touchstone of the tough-on-crime attitudes that are blamed for the mass incarceration of people of color now.
Donald Trump launched Trump University in 2005 to offer real estate investing seminars. Former students of Trump University have sued, saying they were scammed.
Political commentators E.J. Dionne of The Washington Post and Brookings Institution and Eliana Johnson of the National Review speak with NPR's Audie Cornish about Thursday's Republican debate, candidates' tax returns, and a preview of the Super Tuesday primaries.
Republican presidential candidate Donald Trump received the endorsement of New Jersey Gov. Chris Christie Friday. Christie dropped out of the GOP race after the New Hampshire primary.
If you start typing "Is Ted Cruz..." into Google, you'll get a very strange auto-complete involving the Zodiac killer.
Even though Sanders is breaking through in many places, Democrats in Greensboro, Ala. say they feel a connection to Hillary Clinton.
Once Trump's adversary in the presidential race, Christie said Friday "he is a successful person that, like me, isn't afraid to tell it like it is."
More Republicans have turned out to vote in early primary states than ever before, while historic Democratic turnout has dropped off. But that might not equal success in November for the GOP.
It was a crossfire many Republicans opposed to Donald Trump have waited to see, and not always patiently. Had it come earlier, it might have kept some of the other candidates in the hunt longer.
Clinton is looking for a big win on Saturday with the support of African-American voters. Sanders, has had a light schedule in the state, and is looking ahead to next week's Super Tuesday contests.
The GOP presidential candidates held their last debate Thursday before the Super Tuesday primaries. The subject matter was the same as in earlier debates, and so was the sniping among the candidates.
CEO Steven Law tells David Greene American Crossroads has hit states hard with ads targeting Clinton's policies in ways that almost look pro-Bernie Sanders in an effort to render her unelectable.
The final five Republican candidates met for a debate Thursday night in Houston — Texas is one of a dozen states voting next Tuesday in the presidential primaries.
The debate was a free-for-all brawl. Marco Rubio and Ted Cruz took turns taking hits against Donald Trump, trying to portray him as a man with many insults but little substance.
It's the last GOP debate before Super Tuesday. Which candidate will get the most talking time? NPR has its stopwatch at the ready.
The GOP field is thinning, and the race is heating up. Keep up with the most important happenings at tonight's CNN debate.
Following his win in Nevada, Donald Trump is looking more and more like he could be the GOP nominee in November. The Republican leadership in Congress is beginning to come to terms with what that might mean for the party.