First, the Russia scandal isn't really an opportunity for a divided country to fight amongst ourselves any more than his other corruption scandals an abuses are. I mean, you can disagree with me, but we're not exactly divided. I think we both know how serious this crisis is, see the many institutions at risk, recognize the catastrophic damage he can do, and know who's responsible, so we're covered for what matters. While we're not spending any time doing other stuff to organize, attend protests, contact lawmakers, etc., you don't have to do that 24/7 - I've done most of those things in the last two weeks. The GOP faithful will defend him no matter what, so more scandals or less, so it makes little difference other than that he's losing some traditional GOP allies with the Russia scandal.
If you've watched Trump's interactions with various Federal agencies, you might have noticed that he's repeatedly attacked both the CIA and FBI. Like over and over. He compared the CIA to Nazis, and accused the FBI of illegally wiretapping him recently, and he's the sort to double down and never apologize. His way to make amends with the CIA was surprisingly alienating. Those people's job is to know things and do scary things. You might think Trump can fuck with the FBI while his campaign has apparently committing dozens of felonies and not feel consequences, but I think you might be surprised where this one goes. Those organizations are critical ones that safeguard that system for the powerful, and they really don't have a lot of motivation to safeguard Trump's power.