A group of centrist House Republicans sent a letter to GOP leadership warning about adjustments to the Medicaid program, urging them to tread lightly on reforms that could affect “vulnerable populations.”

The budget resolution that passed the House calls on the House Energy and Commerce Committee to identify $880 billion in cuts for the next fiscal year’s budget, which could include cuts to Medicaid as it falls under that committee’s jurisdiction. Republican leadership has vowed not to cut Medicaid benefits but has entertained finding ways to do all of its services more efficiently and at a lower cost.