How Biden’s Senate Allies Helped Push Him From the Race

Senator Jack Reed, the West Point graduate, Army veteran and Rhode Island Democrat who leads the Armed Services Committee, is hardly known as a troublemaker prone to rash statements.

So when Senate Democrats gathered privately with President Biden’s top political advisers last month to assess Mr. Biden’s capacity to remain the Democratic presidential nominee, the decision by the normally taciturn Mr. Reed to be among the first to speak was notable. What was even more remarkable was what he said, according to two attendees: If Mr. Biden wanted to stay in the race after a disastrous debate performance that underscored concerns about his condition and mental acuity, he should submit to examination by two independent neurologists who were willing to report their findings at a news conference.

It was a striking position for a Democratic loyalist to take, and one that underscored the near unanimity among Senate Democrats in the room that day that Mr. Biden should not continue as the party’s nominee. It was just one of a series of extraordinary moments during a closed-door session on July 11 that would lead Senator Chuck Schumer, Democrat of New York and the majority leader, to schedule a face-to-face meeting with the president days later in which he urged Mr. Biden to withdraw.

The effort by Mr. Schumer and Senate Democrats to persuade Mr. Biden to step aside was a more pivotal factor than previously known in bringing about the president’s exit from the race, as he found himself with scant support in the chamber that had been his political home for 36 years.

Representative Nancy Pelosi, who appeared on television hinting at her concerns about Mr. Biden and privately made the case that he could not win, has widely been credited as