Investigators are combing through a message sent by the man accused of charging through a security checkpoint and opening fire at the White House Correspondents’ Dinner in Washington, DC.

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

The suspect, who was carrying a shotgun, handgun and knives, according to DC Metropolitan police, apparently ran past security agents at a checkpoint inside the Washington Hilton hotel, a security vid...