text:  I was the second youngest person ever elected to the United States Senate, and now I'm the oldest. This guy's three years younger and a lot less competent. Former President Trump challenging that assertion, and once again challenging Mr. Biden's claim of being mentally sharp. I took two tests, cognitive tests. I aced them, both of them, as you know. We made it public. He took none. I'd like to see him take one, just one, a real easy one.