White House aide Kellyanne Conway Kellyanne Elizabeth ConwayGeorge and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death George Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' MORE said late Wednesday that President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE "discovered" there doesn't need to be a "physical wall" along the country's entire southern border.

"What's true is that after conferring with the experts who are involved in this process ... the president discovered that part of it will be, he knows, part of it will be the physical wall, part of it is better technology, part of it is also fencing," Conway said during an interview on CNN.

"There are rivers involved, I'm told. There are mountains involved — there's terrain that isn't conducive to building an actual physical structure in some places."

ADVERTISEMENT

Trump campaigned on building a wall along the country's southern border and has suggested the wall must be part of a deal that would include a legislative fix for immigrants protected from deportation by the Deferred Action for Childhood Arrivals (DACA) program, which he is ending.

On Tuesday, Trump said he made clear during immigration negotiations with lawmakers the U.S. needs "the security of the wall" on the border with Mexico.

"As I made very clear today, our country needs the security of the Wall on the Southern Border, which must be part of any DACA approval," Trump tweeted.

On Wednesday, Trump said he will not sign an immigration deal that doesn't include funding for the border wall.

"It's gotta include the wall," Trump said at a press conference with Norway's prime minister. "Any solution has to include the wall."