Democrats are threatening to use every trick in the book to push Republicans to appoint an independent prosecutor to investigate President Trump’s ties to Russia, after Trump’s abrupt firing of FBI Director James Comey.

On Wednesday, Democrats worked to stall work in several committees in protest of Comey’s firing. And while they can’t do much to stop an eventual nominee from moving in the Senate, they made it clear they were ready to wage guerrilla warfare to make it as painful as possible for the GOP until an independent person is picked to head up the Russia probe.