Former Secret Service officials warn of low-tech threats facing Trump after latest Mar-a-Lago breach

A deadly confrontation at Mar-a-Lago, Florida, Sunday is the latest in a string of high-profile security incidents threatening President Donald Trump, as former Secret Service officials warn that low-tech, lone actors now pose one of the toughest challenges to presidential protection.

"It should be quite clear to all of us by now that Trump is the most threatened president in the history of the U.S.," former Secret Service agent William "Bill" Gage told Fox News Digital Monday, pointing...