Catch up with all the guest interviews from NPR's live coverage of the caucuses and primaries in Arizona, Idaho and Utah.
Speaking at Stanford University, Clinton argued Republicans' approach to fighting ISIS "make America less safe and the world more dangerous."
House Speaker Paul Ryan delivered a speech Wednesday on the state of politics in the U.S.
In the aftermath of the Brussels attacks, the Texas senator said law enforcement should be empowered to "patrol and secure Muslim neighborhoods before they become radicalized."
"Personalities come and go. But principles? Principles endure," House Speaker Paul Ryan said Wednesday, in a not-so-subtle jab at Donald Trump.
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.