Nearly half of voters, 49 percent, say they support “a single-payer health care system, where all Americans would get their health insurance from one government plan” — greater than the 35 percent who oppose such a plan. Seventeen percent of voters have no opinion. Two-thirds of Democratic voters support single-payer, while 18 percent oppose it.

Support among Democratic voters has jumped since the last POLITICO/Morning Consult poll to test a single-payer plan, said Kyle Dropp, co-founder and chief research officer of Morning Consult.

“The surge of support for single-payer health care among Democrats is striking,” Dropp said. “In April, 54 percent of Democrats supported the notion. Just five months later and that support has risen to 67 percent.”