What do you expect federal government republicans to do against a state judge?
The judge’s daughter has been the bag-man for the bribes. Look there.
Protest loudly. The government has many instances of getting involved in "states rights".
And congressmen and a senator did show up at the courtroom and sat behind Trump. You don't think that has an effect - congressmen in the courthouse objecting to the proceeding? That, itself, is much more impactful for the overall social process of the trial than sitting in Washington wringing your hands and complaining "It's a state thing. I can't do anything about it."
Look if you think the purpose of our elected officials is to roll over and play dead when there is an outrage like this going on then you should probably run for office as a GOPe.You'd fit right in.
Figure out a way to put that corrupt greasy bastard into prison.
Way past time we started burning them with their own fire.