Best was later pronounced dead at a hospital.US President Donald Trump was in the White House at the time of the shooting.It was the third shooting near the president in the past month, after a man stormed the White House Correspondents' Association Dinner in April armed with guns and knives, and Secret Service officers shot and wounded a man who fired at them earlier this month near the Washington Monument.In a Truth Social post, Trump said the suspect in Saturday's shooting had a "possible obsession with our Country’s most cherished structure" He also used the shooting to promote the ballroom he is seeking to build on the site of the White House’s former East Wing, saying the shooting "goes to show how important it is, for all future Presidents, to get, what will be, the most safe and secure space of its kind ever built in Washington, D.C"