Finally, Democrats — with or without a handful of Republican allies, but preferably with them — can basically try to grind the Senate to a halt, by refusing cooperation on any legislation or nominations or anything, until GOP leaders and/or the White House agree to some form of independent investigation. “Every time they’re asked to cooperate on something, this needs to be front and center,” Wittes says. “They needs to be focused like a laser beam on that every time they’re asked to give unanimous consent.”
They can't really prevent everything, but they can make everything take so much time that life is miserable.