This unprecedented motion could've been dismissed without a hearing, but Cannon can't help but do Trump's bidding. She's issued a series of questionable rulings in Trump's favor and has scheduled several more hearings on motions that are usually rejected without being heard. Of course, what she's doing most of all to benefit Trump is delaying this trial into a future where he may once again be president.
For once, the deck isn't stacked against Trump because Cannon is running this case fairly. Democrats and other enemies of Trump can't stand that, and they're also concerned that under these circumstances this ridiculous case will be thrown out. So calling for Cannon to recuse herself and criticizing her holding hearings on motions are just desperate swipes from those who want this partisan witch hunt to continue.