But Nielsen said in an interview last month with CBS News that DHS will "enforce the law".
Congress also faces another looming deadline, as the United States could have trouble paying its bills within weeks if lawmakers do not take the politically painful step of raising the debt ceiling.
House Republican leaders are pushing a spending bill that would fund the Pentagon for a full year at $659 billion but keep domestic programs on a short leash, with only enough money to last through March 23.
Democrats and Republicans in Congress are trying to agree on bipartisan legislation that would protect Dreamers and boost border security. Schumer called the House GOP proposal "a ruse created to slash funding for education, healthcare, infrastructure and scientific research - all the things the Freedom Caucus doesn't want the government to support".
McCain, along with Democratic Sen. "We'll do a shutdown and it's worth it for our country".
That measure is not likely to survive unscathed in the Senate, where Republicans can not pass spending bills without some Democratic support.
But Meadows was eager for a fight over the military funding.
"You can say what you want, we are not getting the support of the Democrats", Trump said, interrupting her. Democrats have balked at the proposals and forced a three-day government shutdown over the issue last month. And he blamed Democratic lawmakers for the impasse.More news: Under 19 champions India get hero's welcome in Mumbai
"Here we are again", Sen. "That's one question", said Coons. "Governing is not a merry-go-round", he said. There were signs of hope on Monday that an agreement could be within reach.
House Democrats have built flexibility into their retreat in Cambridge, Md., Wednesday through Friday should they need to return to Washington to deal with a Senate amendment to a House funding bill and have even begun plotting their leverage on that measure.
In his tweet Monday, Trump added that "March 5th is rapidly approaching and the Dems seem not to care about DACA".
Republican Senator John McCain and Democratic Senator Chris Coons planned to propose legislation Monday that would shield from deportation "Dreamers" - immigrants who entered the United States illegally as children and were then helped by the Deferred Action for Childhood Arrivals programme, or DACA.
"This is what happens when you have a president who is not clear and consistent on what he will accept: It emboldens all parties to take positions that they won't compromise", added Conant, who served as the communications director for Sen.
This is embarrassing. We had the power to force Republicans to give in to badly-needed protections for immigrants in our country but settled for a vague promise from a senator whom we have no reason to trust. John Cornyn, the second-ranked Republican in the Senate, told reporters of the possible inclusion of a debt-limit increase in the short-term funding bill.
Every year the U.S. admits more than 1.5 million foreign nationals, with the vast majority deriving from family-based chain migration, whereby newly naturalized citizens can bring an unlimited number of foreign relatives to the U.S. In 2016, the legal and illegal immigrant population reached a record high of 44 million.
John McCain and Chris Coons, was quickly rejected by the White House, which cited its lack of funding specifically for a wall along the US-Mexico border and its narrower scope. "If D's oppose this deal, they aren't serious about DACA-they just want open borders", Trump said.