Sen. Marco Rubio (R-Fla.) on Sunday said a shutdown of the United States government would have a “catastrophic impact” on global affairs.

“The last thing we can afford is to send a message to the world that the United States government, by the way, is only partially functioning,” Rubio told CBS’s “Face the Nation.”

“I mean, that would just have catastrophic impact, in my view, or certainly very destabilizing, I should say, impact on global affairs. And so we should keep that in mind going into this week.”

{mosads}Lawmakers must pass legislation to keep the government funded by the end of the week in order to avoid a shutdown.

The latest debate on the spending bill is over President Trump’s proposed wall on the U.S.-Mexican border. White House budget chief Mick Mulvaney on Friday offered Democrats concessions on ObamaCare payments in exchange for border wall funding.

But the office of Senate Minority Leader Charles Schumer (D-N.Y.) has already dismissed the proposal as a “nonstarter.”

Rubio said Sunday that while the push for funding of the border wall is “a fight worth having,” lawmakers cannot have a government shutdown.

“I think that’s a fight worth having and a conversation and a debate worth having for 2018. And if we can do some of that now, that’d be great. But we cannot shut down the government right now,” he said.