There is evidence to support the claim. The judge released information that he wasn't supposed to (judge reversed the release later), and he set the first court day on the day of the GOP convention. There's a few other things too.

How is that no evidence? That is evidence to support the claim. Is it proof? Is it enough to condemn the judge? I don't know, but it is false to say that Trump came out of nowhere with this and has no evidence.