Donald Trump, with about 75 percent of the delegates, and Hillary Clinton, with 90 percent, are so far ahead in their parties that only the most extraordinary events could prevent their nominations.
After Donald Trump won Tuesday's primaries, Ted Cruz and John Kasich are looking ahead. They are mathematically eliminated from getting the GOP nomination unless they can force a contested convention.
For much of the primary season — especially early on when there were 17 candidates — the conventional wisdom relied on lane theory. That is candidates had to win their lane, such as party insider.
Trump calls himself the presumptive nominee; Clinton solidifies her lead. In addition to Mara Liasson's roundup, Steve Inskeep talks to Democratic strategist Margie Omero and GOP strategist Jim Hobart
Former Virginia Gov. McDonnell and his wife were charged with 11 counts of conspiracy to commit fraud under federal law. Now, the nation's top court will decide whether to uphold the conviction.
Now that Tuesday's wins virtually assure Hillary Clinton's nomination, she is doing her best to win over Bernie Sanders' supporters. Sanders is intent on keeping his progressive politics relevant.
In his victory speech Tuesday night, having swept all five primary states that voted, Donald Trump made a comment about Hillary Clinton that went viral. But Mary Pat Christie's face stole the show.
On the Democratic side, it's all but done. The former secretary of state now has 90 percent of the delegates needed to be the nominee. For the GOP, Trump is now the only one who can win a majority.
Catch up on interviews from NPR's special election coverage of the primaries on April 26, hosted by Scott Detrow and Audie Cornish.
Voters in Maryland, Pennsylvania, Delaware, Rhode Island and Connecticut went to the polls on Tuesday. Both Hillary Clinton and Donald Trump are expected to add to their delegate lead.
Tuesday is the so-called "Acela primary." Voters headed to the polls in five northeastern states and we'll hear from them.
Hillary Clinton has started pivoting toward the general election as she hopes to extend her delegate lead Tuesday night out of the reach of Bernie Sanders.
A federal district judge upheld North Carolina's new voting law, including requirements that voters show a government-issued photo ID at the polls and only vote in the correct precinct. Opponents of the law say they will appeal, but the decision could be in effect for the November elections, which voter advocates say might mean some voters, especially minorities, will be disenfranchised. The judge said that did not appear to be the case.
Donald Trump is hoping for big wins in Tuesday's primaries, as his rivals focus on future contests to deny him the nomination.
It's often said that Washington, D.C., is a town obsessed with politics. Apparently, that obsession extends to its chocolatiers. We visit a factory making politically inspired chocolate bars.
What if we took some tips from think-piece culture in the way we talk about our politics?
Five delegate-rich states on the East Coast's "Acela corridor" vote Tuesday. Can frontrunners Donald Trump and Hillary Clinton wrap up their respective nominations?
As Donald Trump moves closer to the GOP nomination, there's been a lot of talk that he'll tone down his image. But that wasn't evident on Monday, the day before five Northeast states hold primaries.
Sen. Jeff Merkley is the only senator to publicly support Bernie Sanders for the Democratic nomination. He talks to Steve Inskeep about his support for Sanders over Hillary Clinton.
A man who says former House Speaker Dennis Hastert sexually molested him decades ago has sued Hastert. He says he wants the rest of a multi-million dollar payoff Hastert promised him.