On Friday, Biden issued a statement that he would be back on the campaign trail the following week, while Biden campaign chair O’Malley Dillon went on MSNBC’s “Morning Joe” to say Biden was “absolutely” staying in the race.

The campaign also put out a memo saying there was “no plan for an alternative nominee.”

Biden called some Democrats over the weekend who were out on TV on his behalf. Two told CNN that the president voiced his gratitude and then his anger at those who were trying to push him out. “There was some hurt in his voice but mostly anger,” one of the Biden loyalists said.

Even on Sunday, Biden’s team continued to publicly maintain he wasn’t going anywhere. South Carolina Rep. James Clyburn, a key Biden ally, told CNN’s Jake Tapper on “State of the Union” that Biden and Harris “have received over 14 million votes to be our standard bearers. That’s where we are,” Clyburn. The congressman’s 2020 endorsement of Biden ahead of the South Carolina primary was widely seen as instrumental in Biden’s victory.

Biden spoke to Harris on Sunday before announcing his decision, which came in two messages: The first saying he was dropping out, and the second endorsing his vice president to be the Democratic nominee.

Biden told his senior-most team he was getting out around 1:45 p.m., and the public letter went out right around then, a source familiar with the timing told CNN.

“Before that, it was all steam ahead that he’s running,” the same source said.

This story has been updated with additional reporting.

CNN’s Kayla Tausche, Dana Bash, John King, Jamie Gangel, Betsy Klein, Sam Fossum, Manu Raju, Samantha Waldenberg, Donald Judd and Kaitlan Collins contributed to this report.