Iverson filed a motion for the judge to recuse herself last month, claiming she has accepted campaign donations from his estranged wife's attorney -- and has a track record of making biased decisions for contributors.
As for the Usher connection -- the lawyer who repped the singer in his child custody showdown with Tameka Raymond is also repping Iverson's ex.
In his motion, Allen claims the judge's decision to strip Tameka of primary custody was biased, and he refuses to get the same treatment.
The judge ain't going anywhere ... for now. She shut down Allen's motion, claiming he failed to provide enough evidence to back his allegations.