He's worried that possibly enough good GOPers get elected in November that he gets impeached and convicted.
I dont think he is worried about Trump, or that he will be impeached. Biden is the front man for those who HATE america. He is thier mouth piece. He will do and say whatever they want him to. Those people behind this speech want to eliminate their opposition once and for all.
That’s the goal. Something nasty is coming this way.