Four Republican senators said Monday they do not support an early Obamacare replacement draft authored by House lawmakers because it does not go far enough to protect those enrolled in Medicaid.

Sens. Rob Portman of Ohio, Cory Gardner of Colorado, Lisa Murkowski of Alaska and Shelley Moore Capito of West Virginia, said the plan “lacks key protections” for those on Medicaid, which was expanded under Obamacare.