Biden, 29 at the time, made an issue of his 63-year-old opponent's age in Delaware
(Newser) -
On Tuesday, President Joe Biden, age 80, made it official : He's running for a second term. If the 46th president wins reelection, he would be 86 by the end of that term, and as CNBC notes, he's already facing questions regarding his fitness for duty, most of them...