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Outfront next, breaking news. The full court press to save Biden's campaign amid growing pressure to step aside.

Tonight, a Democrat in a tight election who says it's time for him to step aside.

Plus, a senior DNC member says he has a plan for how the party could replace Joe Biden should he drop out.

It's a plan he says can beat Donald Trump.

So what is it? He's my guest. And delayed. The judge

in Trump's hush money case postponing the former president's sentencing. So will it happen at all

after the Supreme Court's decision on presidential immunity? Let's go out front.

Good evening. I'm Erica Hill. In for Aaron Burnett. Out front tonight, the breaking news. Biden speaking out. The president just addressing donors, offering an explanation for why he performed so poorly at CNN's presidential debate, blaming his travel schedule, saying he almost fell asleep on stage. Biden isn't the only one trying to do a little damage control tonight.

Here's Vice President Kamala Harris in a new interview with CBS News.

Joe Biden is our nominee. We beat Trump once and we're going to beat him again, period.

Are you ready to lead the country if necessary? I am proud to be Joe Biden's running mate.

Well, for the first time, a Democrat in Congress is now publicly calling on the president to step aside.

In his statement, Democratic Congressman Lloyd Dagav, Texas, writing,

I represent the heart of a congressional district once represented by Lyndon Johnson.

Under very different circumstances,

he made the painful decision to withdraw. President Biden should do the same. And it turns out he's

not alone. In just a moment, I'll speak with a Democrat who's running for Congress and is also urging

Biden to withdraw from the race. All of this as questions about his ability to serve are growing louder. CNN spoke

with more than two dozen Democratic officials, donors and allies of the president, many of them

...