Two House Democrats are calling for a subpoena to compel the Trump administration to turn over key documents relating to their push to implement work requirements for Medicaid.

Democratic Reps. Elijah Cummings of Maryland and Raja Krishnamoorthi of Illinois sent a letter to House Oversight Committee Chairman Rep. Trey Gowdy, R-S.C., on Thursday to ask for the subpoena. Their request comes just a week after more than 4,000 Arkansas residents lost Medicaid coverage due to work rules in the state.