Intruder arrested after entering White House grounds

A member of the Secret Service walks the perimeter of the North Lawn of the White House in Washington, last March. On Friday night, an intruder entered the White House grounds while the President was home. Andrew Harnik/AP
This story was updated at 5:50 p.m. EDT.
An intruder carrying mace and a letter for President Trump made it onto the grounds of the White House shortly before midnight Friday, according to the Secret Service.
President Trump was in the building at the time. The man was taken i