PROVIDENCE, R.I. — The nation’s governors, gathered here for their annual summer meeting, came out strongly on Friday against the new Senate bill to repeal the Affordable Care Act, turning up the pressure on Republican leaders struggling to round up the votes to pass the bill next week.

Opposition came not just from Democratic governors but from Republicans who split along familiar lines — conservatives who said the legislation did not go far enough and moderates who said it was far too harsh on their state’s vulnerable residents.

Gov. Brian Sandoval of Nevada, who at the moment may be the most pivotal figure in the health care debate, said he had “great concerns” with the legislation, and all but declared that he could not support any bill that would scale back Nevada’s Medicaid program. His decision to expand Medicaid under the Affordable Care Act had been “a winner for the people of our state,” he said of the government health insurance program for poor and disabled people.

“I have to be comfortable that those 210,000 lives are going to continue to enjoy the quality of life and health care that they have right now,” he said, referring to the number of Nevadans who gained coverage through the expansion of Medicaid under President Barack Obama’s signature health law.