President Joe Biden was under heavy pressure from fellow Democrats.
After President Joe Biden's decision to drop out of the 2024 presidential race on Sunday, Vice President Kamala Harris has emerged as the party favorite to replace him at the top of the ticket.
Biden endorsed Harris on Sunday -- and since then, many others in the Democratic Party are backing her.
With just a few months before the Nov. 5 election, all eyes are on Democrats as they work to lock in a candidate.
Michigan Gov. Gretchen Whitmer was the final holdout of potential Biden replacements to throw her support behind the vice president.
"Today I am fired up to endorse Kamala Harris for the President of the United States," Whitmer posted to X on Monday.
-ABC News' Isabella Murray
Illinois Gov. JB Pritzker backed Harris on Monday.
"I am proud to endorse Vice President @KamalaHarris for President of the United States," he wrote in a post on X.
Pritzker is one of the final potential Biden replacements to throw is support behind the vice president.
-ABC News' Isabella Murrary
Minnesota Gov. Tim Walz, who is also the co-chair of the DNC's rules committee and the chair of the Democratic Governors Association, voiced his support for Kamala Harris in an X post on Monday.
"Thanks for the call, @KamalaHarris. You have my full support," Walz wrote. "Let's go win this thing."
Sen. Dick Durbin, the Senate's No. 2 Democrat, publicly endorsed Harris Monday morning.
"I'm proud to endorse my former Senate colleague and good friend, Vice President Kamala Harris. Our nation needs to continue moving forward with unity and not MAGA chaos," Durbin wrote in a statement.
"Vice President Harris was a critical partner in building the Biden record over the past four years. Count me in with Kamala Harris for President," Durbin added.
-ABC New's Allison Pecorin
