Two groups that receive a significant amount of their funding from left-of-center dark money networks have helped inspire House Republicans to call off public town halls following a string of protests the groups helped to organize.

Indivisible and MoveOn both disseminated information to their networks of activists showing them where Republican members of Congress would be holding town hall meetings and encouraging them to show up and voice their displeasure with the Trump administration’s Department of Government Efficiency. The tactic seemingly worked, with viral clips of enraged constituents criticizing Republican lawmakers circulating online. The House GOP’s campaign arm advised representatives on Tuesday to cease in-person town halls.