Prosecutor says Biden did not remember when he was vice president or when his son died. There will be no criminal charges, but there will be a serious political blow.

Biden is the first octogenarian president in US history. A poll published last August by the Associated Press-NORC Center for Public Affairs Research found three in four Americans think the president is too old to serve another term. During his campaign, Biden avoided committing to a one-term president, saying he wanted to be a transitional candidate.