President Donald Trump is likely to face new security questions as he plans to attend a series of large, high-profile events in coming months. Saturday night's attack during the White House Correspondents' Association dinner is the third violent episode involving Trump in less than two years. The White House hasn't commented on additional security measures, but more thorough screening and possibly bulletproof glass at public Trump events could be coming. The Republican president has tried to reassure the public he's well protected. But questions are likely to arise going forward. Presidents often chafe at the prospect of too much security.