President Joe Biden was recently given a good piece of advice from a fictional mafia boss. “Let me say this as clearly as I can,” a Friday post to Biden’s X account said. “I’m the sitting President of the United States. “I’m the nominee of the Democratic party. I’m staying in the race.” Let me say this as clearly as I can: I’m the sitting President of the United States. I’m the nominee of the Democratic party. I’m staying in the race. — Joe Biden (@JoeBiden) July 5, 2024 This bold reply, in direct contrast to Biden’s spaced-out demeanor during the June 27 presidential debate, quickly attracted…