U-S Senate Majority Leader Mitch McConnell said it's up to President Donald Trump and Democrats to reach a deal to end the partial government shutdown.
The impasse, which began at midnight on Saturday, is over Trump's demand for billions of dollars in money for a wall along the U.S.-Mexico border.
As the Senate returned to work Saturday, McConnell said he hoped an agreement could be reached "sooner rather than later.''
He added any deal to re-open government would need Democratic support for passage and Trump's signature to be signed into law.
Talks have been continuing, but there's been no clear path forward.
Trump wants $5.7 billion for the border wall with Mexico.
Democrats are only willing to keep funding at existing levels, $1.3 billion, for border fencing and security, but not the wall.
One-quarter of the federal government is closed.
- With files from the Associated Press