Lots of Republicans Want the Current Administration to Fail
Wikipedia definition: "[I]t has come to mean someone who is plotting against the established leadership of a political party or other group, a group of such plotters being called a Cave of Adullam."
Cornford definition: "The Adullamites are dangerous, because they know what they want; and that is, all the money there is going. They inhabit a series of caves near Downing Street. The say to one another, 'If you will scratch my back, I will scratch yours; and if you won't, I will scratch your face.' It will be seen that these cave-dwellers are not refined, like classical men. That is why they succeed in getting all the money there is going."