John Minchillo / AP Updated at 9 p.m. ET: A day after an insurrection that overtook the U.S. Capitol, the Capitol's three top security officials resigned from their posts amid building pressure from lawmakers and others over failures that allowed the dramatic breach. The House and Senate's top protocol officers and the U.S. Capitol Police chief are now all expected to be replaced following a series of resignations in the wake of the security failures. Senate Majority Leader Mitch McConnell said he accepted the resignation of Senate Sergeant-at-Arms Michael Stenger late Thursday. Earlier Thursday, incoming Senate Majority Leader Chuck Schumer said he would fire Stenger if he didn't quit first.