A shooting at former President Donald Trump's rally in Pennsylvania on Saturday left one person killed and two others injured. The suspected shooter, identified by federal authorities as Thomas Matthew Crooks, was killed by U.S. Secret Service gunmen.

The suspected gunman's motive is still a mystery. Both Trump and President Joe Biden, bitter rivals each in their pursuit of a second White House term this fall, have both called for unity as details continue to emerge about the shooting.

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