The South Carolina Republican urged Democrats to "have a rational discussion, but not with the government shut down."

Lindsey Graham, R-S.C., said Sunday that he was in favor of the Senate voting to reopen the federal government but that he would not negotiate with Senate Democrats on their plan to extend Affordable Care Act subsidies while the government was still shuttered.

“I’m willing to vote to open the government up tomorrow,” Graham told NBC News’ “Meet the Press.” “To my Democratic friends: I am not going to vote to extend these subsidies.”