What is supposed to be done?
Consider: https://fivethirtyeight.com/features/gop-criticism-of-trump-is-all-talk-but-it-still-matters/
How about anything besides talk?
Trump’s possible (and growing more likely by the day) compromised position with Russia is an ongoing national security threat. Maybe start by investigating that. Specifically, maybe start by finding out what’s in his tax returns that he’s so afraid of getting out.