Sen. J.D. Vance (R-OH) and Gov. Tim Walz (D-MN) engaged in a spirited healthcare policy back-and-forth largely centered on the history of Obamacare in Tuesday evening’s vice presidential debate.

Vance has had to play interference on healthcare policy in recent weeks since the debate between former President Donald Trump and Vice President Kamala Harris, during which the Republican Party leader said he had “concepts of a plan” to replace Obamacare.