It really looks like the police literally let them in at points.

Cool how militarized police will fire tear gas at protesters outside the white house so trump can get his photo op but be completely absent when 100+ trump supporters literally physically break into the capitol building

The stunning display of insurrection was the first time the US Capitol had been overrun since the British attacked and burned the building in August of 1814, during the War of 1812, according to Samuel Holliday, director of scholarship and operations with the US Capitol Historical Society.