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A man takes a photograph of the stage before a campaign event featuring Republican presidential candidate Donald Trump at St. Norbert College in De Pere, Wisconsin, USA
Democratic presidential candidate Hillary Clinton speaks to an capacity audience during a campaign event in Vernon Hills, Illinois.
Tim Ferris shades himself from the sun while waiting in line to attend a campaign rally with Democratic presidential candidate, Sen. Bernie Sanders, in Kissimmee, Florida, USA
Fans walk through a concourse under a United States flag during the seventh inning of a spring training baseball game between the Seattle Mariners and the Arizona Diamondbacks in Peoria, Arizona
Voters cast ballots at a polling station for Massachusetts’ primary election, as Super Tuesday starts in North Andover, Mass USA
Virginia residents wait in line in the pre-dawn hours to vote in the Virginia primary at a historic property called the Hunter House at Nottoway Park in Vienna, Virginia, USA
Democratic presidential candidate Hillary Clinton acknowledges the crowd as she arrives to speak at a “Get Out The Vote” campaign rally in Norfolk, Virginia
Demonstrators protesting for an increase in the minimum wage enter the media file center at the PBS NewsHour Democratic presidential candidate debate at the University of Wisconsin-Milwaukee
President Barack Obama returns a salute as he boards Air Force One before his departure from Andrews Air Force Base
A supporter waves signs supporting Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, outside a campaign event at Abraham Lincoln High School in Des Moines, Iowa, U.S
Democratic presidential candidate former Secretary of State Hillary Clinton greets supporters during a “get out the caucus” event at the Adel Family Fun Center in Adel, Iowa. With less than a week to go before the Iowa caucuses, Hillary Clinton is campaigning throughout Iowa
A flight deck crew prepares to launch a F18 Super Hornet from the deck of the USS Eisenhower off the coast of Virginia
Soldiers from South Korea (L) and the US (R) gesture as they set up a floating bridge during a US-South Korea joint river crossing exercise in the border county of Yeoncheon, northeast of Seoul
Cathleen Garcia holds a candle during a vigil to honour shooting victims in San Bernardino, California