During the February recess, left-wing activists stormed a number of congressional town hall meetings. Some Republicans reacted by calling them “paid protestors,” but that’s almost certainly untrue. You don’t need to pay people who are as evidently motivated as the fanatics showing up at these town halls to shout disrupt.

And especially in the cases of senators, it’s highly unlikely that many of the protestors are non-constituents being bused in, although evidently there have been cases of this.