Author Elaine Kamarck explains superdelegates, the difference between caucuses and primaries, what happens in a brokered convention and how the rules of primaries can sometimes change.
"Clearly, what happened here is a case of environmental injustice," task force member Ken Sikkema tells reporters. Primary blame rests with a state environmental agency, investigators concluded.
The endorsement is the latest sign that the Republican Party establishment may be lining up behind the Texas Senator.
Former Utah Gov. Mike Leavitt recently endorsed Gov. John Kasich for president, raising eyebrows because another former Utah governor, Mitt Romney, endorsed Texas Sen. Ted Cruz. Both say their aim is to defeat Donald Trump.
Walid Phares, one of Donald Trump's newly-named foreign policy advisers, shares some of the advice he has for the presidential candidate. In 2012 Phares advised then-presidential candidate Mitt Romney.
Some voters in Arizona reportedly waited more than four hours to cast their ballot on Tuesday. The lines were expected in at least one county, as polling places had been cut to save money.
Bernie Sanders and Ted Cruz both drew victories on Western Tuesday. Hillary Clinton and Donald Trump's wins in Arizona may likely mean their overall delegate lead won't winnow much.
Ex-Utah Gov. Mike Leavitt endorsed Ohio Gov. John Kasich for president, raising eyebrows because ex-Massachusetts Gov. Mitt Romney endorsed Texas Sen. Ted Cruz. But they say their aim is the same.
Now that the polls are closed, political scientist Richard Herrera of Arizona State University provides some analysis about that state's primary and one of its hot button issues: immigration.
Religious schools and other non-profits like the Littler Sisters of the Poor say the government's workaround for birth control still imposes a burden on their freedom.
Republicans are hoping to stop Donald Trump's delegate climb while Bernie Sanders is looking to rebound against Hillary Clinton.
Our most recent #NPRObamaEffect chat explored how — or whether — the Obama years have shaped how Latino communities and people across the country think about identity today.
Republican support for Israel is rooted in the evangelical wing of the party. Some Christian Evangelicals believe God gave Israel to the Jews as their "promised land." Others believe Israel's destiny is linked to Jesus Christ's return to Earth.
The terrorist attacks in Brussels on Tuesday spurred reactions from some of the presidential candidates in the U.S.
Tens of thousands of Utah Republicans will cast their ballots for president via the Internet. The state party says it's the largest online presidential vote yet.
Trump once again turned to protectionism as a way of dealing with the world, but it won't necessarily mean it will launch him to the White House.
Ted Cruz looks to stop Donald Trump in Utah and pull off an upset in Arizona. Bernie Sanders could notch wins in Idaho and Utah, but Clinton has an advantage in Arizona, the big prize of the night.
The president mentioned the Brussels attacks during a historic address to the Cuban people at the Gran Teatro on Tuesday. Latin America expert Christopher Sabatini and NPR reporters provide analysis.
GOP presidential candidates were among the first politicians to respond to the Tuesday morning attacks.
Members of the pro-Israel group AIPAC heard from nearly all of the remaining presidential candidates at their annual policy conference Monday.