About one minute after Pence was hustled out of the chamber, a group charged up the stairs to a second-floor landing in the Senate, chasing a Capitol Police officer who drew them away from the Senate.

Pence and his family had just ducked into a hideaway less than 100 feet from that landing, according to three people familiar with his whereabouts, who spoke on the condition of anonymity because of the sensitivity of the situation. If the pro-Trump mob had arrived seconds earlier, they would have been in eyesight of the vice president as he was rushed across a reception hall into the office.

The proximity of the Jan. 6 attackers to the vice president and the delay in evacuating him from the chamber — which have not been previously reported — raise questions about why the Secret Service did not move him earlier and underscore the jeopardy that top government leaders faced during the siege.