What did the vice president know, and when did she know it? It’s a spin on the old line from the Watergate hearings — and curiously enough, it hasn’t really been posed to Kamala Harris since President Joe Biden basically handed her the Democratic nomination in mid-July after his campaign unraveled following his obviously senile performance in a June 27 debate. She had told the country that Biden was at the top of his game. She was supposedly the last person that was in the room when he made a decision. She knew that was a lie; the same way we all found out, in an unmanaged environment, that i…