 This is CBS News on the Hour, sponsored by O'Reilly Auto Parts. I'm Christopher Cruz. President Biden will hold a rare solo news conference Thursday. It may be his last chance to quiet those who want him off the ticket. Peter Mayer is a CBS News contributor and former White House correspondent. The White House knows there's no real make-good moment following last week's disastrous debate, but this news conference will be the president's first real opportunity since that face-off to show how he can publicly react on his feet