2024 election updates: 'I've gotta finish this job,' Biden says

Hawaii Democratic Rep. Ed Case and Arizona Democratic Rep. Greg Stanton became the 12th and 13th House Democrats to call on President Joe Biden to step aside.

"I do not believe President Biden should continue his candidacy for re-election as President," Rep. Chase said in a statement. "This has nothing to do with his character and record. If it did, there would be no decision to make. This is solely about the future, about the President's ability to continue in the most difficult job in the world for another four-year term."

In a statement, Rep. Stanton said Biden was "a fierce defender of American democracy," but called Trump an "existential threat to our Constitution and the rule of law."

"The Democratic Party must have a nominee who can effectively make the case against Trump, and have the confidence of the American people to handle the rigors of the hardest job on the planet for the next four years," Stanton said. "For the sake of American democracy, and to continue to make progress on our shared priorities, I believe it is time for the President to step aside as our nominee."

Rep. Brad Schneider, D-IL, calls on President Joe Biden to step aside from the 2024 Presidential race.

The congressman is the 11th House Democrat to publicly call for Biden to leave the race.

"The time has come, however, for President Biden to heroically pass the torch to a new generation of leadership to guide us to the future he has enabled and empowered us to pursue," Schneider says in a lengthy statement.

Schneider is the vice chair of the New Democrat Coalition.

MORE | Illinois Rep. Schneider calls on President Biden to 'pass the torch,' following Rep. Quigley's lead

Biden's high-stakes press appearance scheduled for Thursday night is his first formal solo news conference since November 2023.

The president's last similar outing came nearly eight months ago when he took questions from reporters after his summit with Chinese President Xi Jinping in California.

At that news conference, Biden called on reporters from four organizations, one of whom asked two questions.

White House press secretary Karine Jean-Pierre jumped in to end the news conference after the fourth reporter, though Biden proceeded to answer an additional nine questions.

Biden's most recent joint news conference was during the G7 summit last month.

President Joe Biden's campaign is testing head-to-head matchups of Vice President Kamala Harris against former President Donald Trump, a source familiar with the strategy told ABC News. It's a strategic shift that comes with increasing scrutiny on whether Biden should end his 2024 reelection campaign.

The source casts this as a response to the fact that Trump has begun to attack Harris in his public statements and speeches.

"Donald Trump shifted his stump speech. We'd be dumb not to adjust," the source told ABC News. "We obviously pay close attention to what he is saying."