I only watched some of the case, but the root of it seemed to be there were two referrals to the Texas DA, but a group of top attorneys there only knew about one of them.

It looked like Paxton was corrupt by issuing subpoenas to banks based on the second referral, so next day they get together as a cabal and refer it to the feds instead of asking Paxton about it and finding out it was a nothingburger. FBI opened an investigation but didn't do anything because there was no crime, so I guess the cabal took it to impeachment because they couldn't admit they were in the wrong.

Also some people telling telephone-game type gossip that turned out to be false.