FBI says it hasn't determined a motive for assassination attempt on Trump

On the heels of an attempt to kill him, former President Donald Trump called Sunday for unity and resilience as shocked leaders across the political divide recoiled from the shooting that left him wounded but fine.

A former fire chief attending the rally with family was killed, as was the gunman. Two other people were also critically wounded.

President Joe Biden, Trump's rival in November, said the attempted assassination was not who we are as a nation. Biden also said he ordered an independent review of security at the rally in Pennsylvania.

The attack drew new attention to political violence in a deeply divided U.S. about four months before the next presidential election. It was the most serious attempt to kill a president or presidential candidate since Ronald Reagan was shot in 1981, and it came days before Trump is scheduled to accept the GOP nomination at the Republican National Convention in Milwaukee.

The FBI identified the shooter, who was fatally shot by Secret Service ..