2016 presidential election

Early primary voters head to the polls Tuesday in Arizona, Utah and Idaho.

Republican House Speaker Paul Ryan on Thursday acknowledged increasing chances that the party will be facing an "open convention," noting the ongoing opposition posed against Trump by Texas Sen. Ted Cruz and Ohio Gov. John Kasich. Without a clear cut nominee, the party will have to resort to a floor fight to pick a nominee.

As Hillary Clinton inches closer to gaining the Democratic Party's nomination for president of the United States, the nation's current leader made a weighty appeal on the former first lady's behalf. At a dinner last Friday, President Barack Obama appealed to donors at the private to rally around Clinton, The New York Times reports.

Donald Trump told CNN that violence could erupt if he finishes with the most delegates, and the nomination goes to someone else.

As voters headed to the polls in five early voting states Tuesday, presidential candidates in both parties zig zagged across the country as they made last-ditch efforts to make an impression.

Stacey Dash, a Fox News contributor, rose to Donald Trump's defense in a rambling blog post on her website.

Democratic presidential candidate Bernie Sanders came out swinging at Republican front-runner Donald Trump at Sunday's TV One, CNN Ohio Democratic Presidential Town Hall, calling him a "pathological liar."

Democratic presidential candidates Hillary Clinton and Bernie Sanders declined to call Republican front-runner Donald Trump a racist when asked the question during a debate Wednesday at Miami Dade College in Miami, Florida. But they hammered away at his racist and xenophobic rhetoric.

Over the weekend, presidential hopeful and GOP frontrunner Donald Trump garnered an endorsement from another unlikely source -- the brother of murdered civil rights leader Medgar Evers.

After Republican presidential candidate Donald Trump appeared to reluctantly disavow the endorsement of former KKK leader David Duke and then made supporters raise their right hands and pledge to vote for him, Saturday Night Live found perfect fodder to spoof an ad for the front-runner's candidacy.

While Republican presidential front-runner Donald Trump bragged about his penis size at the start of Thursday night's raucous debate in Detroit, Michigan, the Flint water crisis was the 33rd question.