 The idea that I'm the old guy. I am. I'm old. But I'm only three years older than Trump, number one. And number two, my mental acuity has been pretty damn good. I've gotten more done than any president has in a long, long time, in three and a half years. Biden also responded to Trump's choice of Ohio Senator J.D. Vance as his Republican running mate. Biden says Vance is another Trump.