Trump's Oval Office speech - his first as president - will be followed by his visit Thursday to the southern border to highlight his demand for a barrier.
President Donald Trump says he will address the nation Tuesday night about what says is a "crisis" at the U.S. -Mexico border.
President Trump plans to address the nation on Tuesday regarding the government shutdown.
Democrats say Trump's request is too high and urge Trump to support passage of legislation funding the government immediately and then negotiate border security, including a wall, over the next few weeks.
The House, with a new Democratic majority, passed appropriations in January that did not include wall funding but Senate Majority Leader Mitch McConnell (R-Ky.) said he wouldn't bring it to the Senate floor because of a lack of Republican support.
Trump is prepared to bypass Congress if necessary by declaring the emergency if he does not get the $5.6 billion in funding he wants to build the wall, his White House press secretary said.
As the shutdown lurched into a third week, many Republicans watched nervously from the sidelines as hundreds of thousands of federal workers went without pay and government disruptions hit the lives of ordinary Americans. TSA said it screened more than 2.2 million passengers Sunday, a historically busy day due to holiday travel.
Democrats sought written details from the Department of Homeland Security on budget needs; the White House said it would provide that.
In New Mexico, Border Patrol agents walked the Congressional delegation through the holding areas of the Alamogordo station, which Representative Jerry Nadler, a Democrat from NY, said were "miraculously" empty.
During that trip, Trump toured 30-foot-tall steel and concrete prototypes of the border wall in California and strongly condemned jurisdictions that offer "sanctuary" to undocumented immigrants. "But all the signs here indicate that is not what Donald Trump has in mind, and the networks have a decision to make", she said.
Misleading characterizations of the situations like that are what Bauer claims could hurt Trump if he has to defend use of the National Emergencies Act of 1976 in court.
Mark Morgan, who served as chief of the Border Patrol during the Obama administration, explained Monday on Fox News the practicality of a border wall.
Democratic lawmakers have repeatedly rejected Trump's demand that 5.6 billion US dollars be added to the 2019 budget to fund the border wall.
"If he has to give up a concrete wall, replace it with a steel fence.so that Democrats can say, 'See? And that doesn't come just from me, that comes from the professionals, they have been doing this their entire lives serving the country...they are saying that works", Morgan said.