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President Obama during a news conference at the White House on Dec. 16.
Donald Trump speaks during a campaign stop on Wednesday in Indianapolis.
Bernie Sanders speaks during a campaign rally in Chicago in February.
Santa Claus village on the Arctic Circle near Rovaniemi, Finland on Dec. 21, 2002.
People show their hands to Secret Service agents before Donald Trump comes by to greet them during a campaign event Dec. 5 at Mississippi Valley Fairgrounds in Davenport, Iowa.