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Tonight, the major test for President Biden in a make-or-break moment for his campaign.

The 81-year-old's highly anticipated unscripted solo press conference has members of his own party raise fresh doubts.

Can we honestly say that we're on a path to defeating Donald Trump?

The CBS evening news starts now.

No. defeating Donald Trump. The CBS evening news starts now. The stakes could not be any higher for what may be the most consequential news conference

of President Biden's career and his 50-plus years in public service.

Good evening. I'm Nora O'Donnell, and thank you for being with us.

Moments from now, the president will take questions in his first solo news conference in eight

months, and we will bring that to you right when it starts. Every word, every pause, every motion

will be scrutinized, fairly or unfairly, as Democrats weigh two key questions. Can Biden beat Donald Trump in November? And if he can,

is he fit to serve another four years in the White House? American voters have been watching intently

since the president's uneven debate performance two weeks ago today. And as the Biden campaign

tries to turn the page and turn attention back on Donald Trump, but so far with

little success. We have team coverage tonight, and we're going to begin with CBS's Ed O'Keefe

at the White House.

President Biden kept a packed schedule today at the NATO summit ahead of tonight's much-anticipated

news conference, certain to be watched closely by supporters, skeptics, and enemies.

He's been preparing in the same way that I've seen him prepare in the past for

press conferences or for other major events. He'll be ready.

But shortly before the press conference started, Biden, when introducing Ukrainian president

...