Money is flooding in to produce and buy TV time for anti-Donald Trump ads. NPR's Ari Shapiro talks with Elizabeth Wilner, senior vice president of Kantar Media Ad Intelligence, about how effective the anti-Trump ads were for Tuesday's primaries.
After defeating Hillary Clinton by a hair in the Michigan primary, Bernie Sanders will debate his rival in Miami on Wednesday night.
Donald Trump pushed back against attacks on his business prowess this week, showing off examples of Trump-branded water, wine and steaks. But Trump's own ties to those products may not be as strong as he suggested.
Sanders has a steep hill to climb to win enough delegates in the presidential primary. But he doesn't seem deterred, telling NPR, "I am used to climbing steep hills."
Trump Water, Trump magazine, Trump Steaks. So much Trump and all on stage after his wins in Michigan, Mississippi and Hawaii Tuesday night. But almost none of them actually are Trump.
"The truth is, Donald Trump and Hillary Clinton are two sides of the same coin. They're not going to reform the system. They are the system," Fiorina, who ended her own bid last month, said.
The Missouri Senate has given preliminary approval to a proposed state constitutional amendment that would protect groups and people with religious objections to same-sex ceremonies.
NPR's Kelly McEvers spoke with Jelani Cobb, who has charted the genesis and evolution of the Black Lives Matter movement.
GOP voters are turning out in droves compared with 2008's contests, while lots of Democratic voters are staying home.
Bernie Sanders pulled off an upset in Michigan, but Hillary Clinton handily took Mississippi. On the Republican side, Donald Trump racked up three more victories and Ted Cruz won in Idaho.
As expected, Hillary Clinton won the Mississippi primary. Michigan was the bigger prize and polls leading into the primary had Clinton up by double digits, but that's not how it turned out.
Sen. Ron Wyden says prosecutors may be taking advantage of a law enforcement tool that allows them to detain people as "material witnesses" in federal investigations by holding them indefinitely.
Sanders needs to make a habit of winning, and by wider margins than in Michigan. Still, however steep the climb may appear, this Tuesday made it harder than ever to count the Vermonter out.
What the Michigan and Mississippi exit polls tell us about Trump's big wins and Sanders' upset.
There were incidents at high school basketball games where fans chanted "build a wall" at teams made up of minority students. David Greene talks to Washington Post sports columnist Kevin Blackistone.
Florida is the next prize on the GOP primary calendar with 99 delegates at stake. Most polls show Trump in the lead. Florida is Marco Rubio's home state but analysts don't expect him to eke out a win.
What has happened to the GOP since it was trounced in the last presidential election? Henry Barbour, co-authored of the autopsy report, looks at whether his party paid attention to its conclusions.
Democratic pollster Margie Omero and Republican strategist John Feehery look at what the voter turnout numbers mean following Tuesday's primary contests.
Get caught up with guest interviews from live coverage of the primaries and caucus in Michigan, Mississippi, Idaho and Hawaii.
Kyle Odom had been sought for the weekend shooting of Tim Remington, who had led a prayer at a Ted Cruz campaign rally and was shot the next day.