 But when Biden walked on the set of the infamous debate last month, he did so with shuffling half-staffs, the gait of an old man. Meanwhile, I'm afflicted with his own disease. I won't get into it. Constant pain has made me lame. I've not been able to walk for a year and use a rolling walker to move about. I try to be philosophical. But as a reporter, I saw relatively young men whose campaigns I covered age dramatically. Jimmy Carter, Bill Clinton, George W. Bush.