If President Joe Biden is on his last leg as a candidate, you'd never know it by his effort to energize Democratic troops Friday at a campaign rally in Raleigh, North Carolina. "I know I'm not a young man. Let’s state the obvious" Biden said, in a nod to the halting performance he delivered at Thursday night's debate in Atlanta. He paused, and chants of "Joe!" began to sweep the crowd. "Folks, I don't walk as easy as I used to. I don't speak as smoothly as I used to.