AG Barr forbid Muller to speak of ANYTHING outside the report Muller authored. Why?
BECAUSE BARR IS THE BOSS.
There is no upside for democrats to Muller testifying at this point. IF they were smart the Democrats would cancel the whole mess. They aren't, so they won't. Even so that doesn't stop idiots like the OP from crafting a delusion that has nothing to do with reality.