Negotiations on an economic stimulus measure that had hit about $1.8 trillion by Sunday — and probably climbing — were set to continue Monday morning, top Senate and White House officials said late Sunday night.

“I think we’re very close. The teams are going to work through the night. We’re going to regroup the principals in the morning," Treasury Secretary Steven Mnuchin said. "We’re going to work very hard to get this done tomorrow.”

White House legislative affairs director Eric Ueland said administration negotiators would be back up at the Capitol by 9 a.m. to continue talks.

Senate Minority Leader Charles E. Schumer, D-N.Y., late Sunday said he'd met with Ueland and Mnuchin six times that day. He said while there are "some serious problems" with the package Senate Republicans circulated late Saturday, he thought a deal could be near.

"We're getting closer and closer and I'm very hopeful … that we could get a bill in the morning," Schumer said.