Vermont Sen. Bernie Sanders claimed victories in Democratic presidential caucuses Saturday in Washington, Alaska and Hawaii, scooping up key delegates in the primary race against front-runner Hillary Clinton.

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.

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.

National

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."

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.

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.

Charles Evers believes that a man who was reluctant to denounce the KKK is best for the state of Mississippi and the country at large.

The 28-year-old pop singer announced his Trump endorsement via Twitter on Saturday.

Dolores Huerta, longtime civil rights activist and Clinton supporter, offered to translate in Spanish and claims she was met with much objection.

Hollywood legend Morgan Freeman has given Hillary Clinton's latest presidential advertisement a touch of sincerity and cinematic glory.