Of the 800,000 federal employees affected, about 350,000 are furloughed - a kind of temporary lay-off - while the rest are continuing to work.
The partial shutdown would set a record early Saturday, stretching beyond the 21-day closure that ended Jan 6, 1996, during President Bill Clinton's administration.
"While the President has broad military authorities, as the Commander in Chief, when it comes to declaring a national emergency, I can not and will not support reallocating funding we approved in a bipartisan effort in Congress for the recovery and reconstruction of Puerto Rico", Gonzalez said.
Some US media reports suggest the White House is considering diverting some of the $13.9bn allocated previous year by Congress for disaster relief in such areas as Puerto Rico, Texas and California to pay for the wall.
Trump indicated he was slowing what had appeared to be momentum toward the national emergency declaration as the way out of the stalemate.
"If they can't do it".
Until now, Trump had suggested numerous times that he was getting closer to taking the controversial decision. He suggested that if he can not reach an agreement with House Democrats on funding the border wall, he would declare a national emergency.
Before lawmakers left Washington on Friday, House Minority Whip Steve Scalise, R-La., attempted to make a similar point as Trump did Saturday about the 2016 election in a floor exchange with Majority Leader Steny Hoyer, D-Md.
"I think it's the most insulting article I've ever had written, and if you read the article you'll see that they found absolutely nothing".
Experts have said even though the president may have the authority to invoke powers under the 1976 National Emergencies Act, using it will nearly certainly bring on a court battle.
Trump has told advisers he believes the fight for the wall, even if he never gets money for it, is a political win for him. Because the funding has yet to be officially applied to these projects, the president has the authority to redirect it toward the construction of a border wall.
Both Democrats and Republicans agree that the US-Mexican border presents major challenges, ranging from the violent Mexican drug trade to the plight of asylum seekers and poor migrants seeking new lives in the world's richest country.
He asserted that a border wall is needed because "23% of Federal inmates are illegal immigrants".
"I have the absolute right to declare a national emergency, the lawyers have so advised me", Trump said outside the White House.
White House press secretary Sarah Sanders did not immediately respond to PEOPLE's request to clarify who is now in the White House with the president.
He said: "We're doing our best to make sure it doesn't impact our diplomacy".
"We need to look at the facts", she said. Trump said Friday that he planned to sign a bill guaranteeing that federal employees will be given back pay once the government reopens. Among Democrats, just 7 per cent say the situation amounts to a crisis, and 52 per cent say conditions are serious.
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