Donald Trump impersonator Robert S. Ensler speaks on a phone before the presidential hopeful holds a rally in Las Vegas on Monday, December 14.
U.S. Sen. Bernie Sanders, who is seeking the Democratic Party's nomination, leaves a Washington mosque on Wednesday, December 16. Sanders attended an interfaith discussion on standing up to anti-Muslim rhetoric.
Arizona Secretary of State Michele Reagan uses a lottery machine on Tuesday, December 15, to decide where presidential candidates will appear on the state's ballots.
Republican presidential candidate Sen. Ted Cruz is seen through Christmas lights as he speaks during a campaign event on Friday, December 18, in Kennesaw, Georgia.
White House press secretary Josh Earnest speaks in the briefing room on December 18, with "Star Wars" characters R2-D2 and Storm Troopers.
House Speaker Paul Ryan calls on a reporter during an end-of-the-year news conference in Washington on Thursday, December 17.