Jessica Taylor

Among them: Two incumbent Pennsylvania congressmen are on the defense amid questions about their ethics and personal relationships; and Maryland candidates for Senate are divided by race and gender.

Donna Edwards is vying to be just the second black woman ever elected to the Senate. But not all of the state's black female leaders or African-American members of Congress are lining up behind her.

Wine retailer David Trone is spending $12.4 million of his own money to win a Maryland House seat, but his rivals say he's trying to buy his way into Congress.

For the first time in 40 years, the presumptive nominee for the Republican Party might not be known before the convention. That could bring multiple ballots and — chaos.

The two front-runners easily bested their competition. Ted Cruz, unlikely to pick up any delegates, finished third behind John Kasich, and Bernie Sanders fell further behind in pledged delegates.

The stakes are high for both Hillary Clinton and Donald Trump. Clinton hopes New York can help make it clear she will be the nominee. Trump needs a big day to get closer to his magic delegate number.

Both Ted Cruz and Bernie Sanders notched wins over their party's respective front-runners as they aim to close the delegate lead and push for a contested convention.

Ted Cruz hopes support from Scott Walker and the state's influential talk radio contingent can help him topple Trump. Meanwhile, Bernie Sanders hopes the state's progressive bent bends for him.

Ted Cruz and Donald Trump are also backing a Republican Party rule that would prevent the Ohio governor's name from being placed in contention at the Republican National Convention in July.

Trump has gone on the attack against Wisconsin Gov. Scott Walker in his home state this week. But that could be a big political miscalculation heading into Tuesday's primary.

"It's not easy to tick me off. I don't get angry often," Ted Cruz told reporters while campaigning in Wisconsin. "But you mess with my wife, you mess with my kids, that'll do it every time."

Bernie Sanders and Ted Cruz each notched victories in Tuesday's Western contests, but Hillary Clinton and Donald Trump won big in Arizona, the most populous state voting Tuesday.

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 Republican took a detour from the campaign trail on Monday to try to build relationships with GOP officials — while also promoting his latest signature building just blocks from the White House.

The 2012 GOP nominee says he's voting for the Texas senator in Tuesday's Utah GOP caucuses, hoping to force an open convention as a way of stopping Trump from getting the Republican nomination.

The Democrat eked out a slim victory of just 1,531 votes over Vermont Sen. Bernie Sanders, who said he wouldn't ask for a recount in the state's primary.

Republicans remain steadfast in their refusal to consider any nominee to the Supreme Court during an election year. President Obama told NPR that argument is "puzzling."

As Donald Trump continues to win primaries across the country, his amorphous coalition grows. White voters propelled a Hillary Clinton win in Ohio, while black voters helped her take Illinois.

The Florida senator is dropping out of the White House race after losing his home state's GOP primary to Donald Trump.

Tuesday night meant the end of the road for Marco Rubio, but it doesn't mean the GOP race got that much clearer. On the Democratic side, Hillary Clinton added to her wins over Bernie Sanders.