Demonstrators with Our Revolution delivered what the progressive activist group said were more than 10,000 digital “signatures” on Thursday to Sen. Chuck Schumer’s (D-NY) Washington office, demanding he resign as Democratic leader for his handling of the government shutdown.

The episode was the latest outpouring of anger at the New York Democrat for what liberal groups say was an unforgivable failure to keep his members united, after a group of Senate Democrats dropped their healthcare demands to help Republicans end the shutdown that concluded Wednesday.