That's quite insane, to think it's your duty to rally behind some super-weak candidate because Trump pointed out corruption by the Bidens and Obama (which others including myself had been pointing out well before Trump ever did anything) and the same folks who incessantly drilled into your mind the Russian collusion hoax for over two years now shifted from one country to the next, continuing to project and accuse others of what they themselves are doing.
Trump didn't point out anything. He just says anything that comes into his mind that he thinks will sound good to his supporters. His claims are based on zero evidence. I think a beach ball could beat Trump for president. Since that beach ball is named Joe Biden, I will be supporting him.
I bet you still believe there was some kind of unclear "Russian collusion", and that they have lots of solid evidence to impeach Trump. 
They did have solid evidence to impeach Trump. He's been impeached.