WASHINGTON >> President Donald Trump was firing Twitter barbs at Democrats this weekend as talks to end a weeklong partial government shutdown remained at a stalemate.

Trump was cooped up in the White House after canceling a vacation to his private Florida club.

As the disruption in federal services and public employees’ pay appeared set to continue into the new year, there were no signs of any substantive negotiation between the blame-trading parties.

White House counselor Kellyanne Conway said Sunday that Trump is not reaching out to Democrats, rather he’s waiting for Democrats to reach out to him. “It is with them,” she told Fox News Sunday.

Trump is holding out for billions in federal funds for a border wall between the U.S. and Mexico, which Democrats have said they were intent on blocking.

There has been little direct contact between the sides during the stalemate, and Trump did not ask Republicans, who hold a monopoly on power in Washington until Jan. 3, to keep Congress in session.

Senator Lindsey Graham, R-S.C., said he hoped to end the shutdown by offering Democrats incentives to get them to vote for wall funding.

“To my Democratic friends, there will never be a deal without wall funding,” Graham said Sunday on CNN.

Graham is proposing to help two groups of immigrants to continue living in the U.S. with permission from the federal government: about 700,000 young “Dreamer” immigrants brought illegally as children and about 400,000 people receiving temporary protected status because they are from countries struggling with natural disasters or armed conflicts. He also said the compromise should include changes in federal law to discourage people from trying to enter the U.S. illegally.

“Democrats have a chance here to work with me and others, including the president, to bring legal status to people who have very uncertain lives,” Graham said.

He said he would discuss the proposal with Trump today over lunch at the White House, though it was unclear if the president or Democrats were open to such an approach. A previous deal that addressed the status of Dreamers failed to pass as a result of escalating White House demands.

As he called for Democrats to negotiate on the wall, Trump brushed off criticism that his administration bore any responsibility for the recent deaths of two migrant children in Border Patrol custody. Trump claimed the deaths were “strictly the fault of the Democrats and their pathetic immigration policies that allow people to make the long trek thinking they can enter our country illegally.” His comments on Twitter came as his Homeland Security secretary met with medical professionals and ordered policy changes meant to better protect children detained at the border.

Trump earlier had upped the brinkmanship by threatening anew to close the border with Mexico to press Congress to cave to his demand for money to pay for a wall. Democrats are vowing to pass legislation restoring the government as soon as they take control of the House on Thursday, but that won’t accomplish anything unless Trump and the Republican-controlled Senate go along with it.

Talks have been at a stalemate for more than a week, after Democrats said the White House offered to accept $2.5 billion for border security last Saturday. Senate Democratic leader Chuck Schumer told Vice President Mike Pence that it wasn’t acceptable, nor was it guaranteed that Trump, under intense pressure from his conservative base to fulfill his signature campaign promise, would settle for that amount.

Conway claimed Sunday that “the president has already compromised” by dropping his request for the wall from $25 billion, and she called on Democrats to return to the negotiating table.

But Conway indicated that Trump has moved off his demand for a physical wall along parts of the border, as he promised during his 2016 campaign, calling discussion of a wall “is a silly semantic argument.”

“There may be a wall in some places, there may be steel slats, there may be technological enhancements,” Conway said. “But only saying ‘wall or no wall’ is being very disingenuous and turning a complete blind eye to what is a crisis at the border.”

Trump has remained out of the public eye since returning to the White House early Thursday from a 29-hour visit to U.S. troops in Iraq, instead taking to Twitter to attack Democrats. He also moved to defend himself from criticism that he couldn’t deliver on the wall while the GOP controlled both the House and Senate.

“For those that naively ask why didn’t the Republicans get approval to build the Wall over the last year, it is because IN THE SENATE WE NEED 10 DEMOCRAT VOTES, and they will gives us “NONE” for Border Security!,” he tweeted. “Now we have to do it the hard way, with a Shutdown.”

Meanwhile, the effects to the public of the impasse grew as the Environmental Protection Agency, which had the money to function a week longer than some agencies, implemented its shutdown plan at midnight Friday night. EPA spokeswoman Molly Block said many of the agency’s 14,000 employees were being furloughed, while disaster-response teams and certain other employees deemed essential would stay on the job. That includes workers needed for preventing immediate public health threats at more than 800 Superfund hazardous-waste sites.

Also running short on money: the Smithsonian Institution, which said its museums, art galleries and zoo in the capital will close starting midweek if the partial shutdown drags on.

But federal flood insurance policies will continue to be issued and renewed, in a reversal prompted by pressure from lawmakers, said Republican Sen. Marco Rubio of Florida.

Trump appeared no closer to securing money for his signature border wall, which he vowed during the campaign that he would make Mexico pay for. He’s failed to do so. Now Democratic leaders are adamant that they will not authorize money for the project, calling it wasteful and ineffective. They show no signs of bending, either.

The shutdown is forcing hundreds of thousands of federal workers and contractors to stay home or work without pay.

The White House has not directly engaged in weeks with the House Democratic leader Nancy Pelosi, who has all but locked up the support she needs to win the speaker’s gavel after the new Congress convenes on Thursday.

Pelosi has vowed to pass legislation to reopen the nine shuttered departments and dozens of agencies now hit by the partial shutdown as soon as she takes the gavel.

Pelosi spokesman Drew Hammill added that Democrats are united against the wall and won’t seriously consider any White House offer unless Trump backs it publicly because he “has changed his position so many times.”