Vice President Mike Pence said the government shutdown was not a mistake because it showed Trump standing up for what he believed in.
"Such caravans are the result of Congress's inexcusable failure to fully fund a needed physical barrier," DHS Secretary Kirstjen Nielsen said.
A West Virginia EMS director was suspended after posting a picture touting Trump's border wall that showed several decapitated dark-skinned men's heads behind a smiling white man.
The president's threat to build a "human wall" follows Sunday's announcement that nearly 4,000 additional U.S. troops would be deployed to the southern border.
"Am I supposed to be quiet because I can't write what I want, or I can only write what they want or makes them happy? No."
Andrew Napolitano did, however, say that declaring a national emergency would help Trump gain political points with his base.
"The public is solidly against the expansion of the border walls and remains sympathetic toward immigrants in the country illegally," said polling expert Jim Norman.
Coulter also called Trump "lazy and incompetent."
The DEA noted in October 2018 that most heroin is brought into the country at legal ports of entry.
"Walls are placed strategically, along with what the speaker talked about, better technology at ports of entry, more border control agents, more detention beds, drones," said Senator John Kennedy.
However, experts say the funding estimates are wildly off.
"It's probably easier to do if you leave it up to the [bipartisan committee] and let us do it," said GOP Senator Richard Shelby, a member of the congressional committee that's tasked with hashing out a border security deal.
President Donald Trump has repeatedly threatened to declare a national emergency in order to obtain funding for his wall.
"I was very disappointed in Paul because the wall was so desperately needed. And I'll get the wall," the president said.
"Now in any normal administration it would be insane to suggest...even joke about the president of the United States seeing stuff in a movie ... and maybe thinking it was real," MSNBC host Rachel Maddow said.
"I think the idea of a wall in and of itself is a symbol. It's not a real tool," former Department of Homeland Security Secretary Michael Chertoff told Newsweek.
"It's my great honor to accept," Trump said on Monday. "We have a great story to tell and yet, great goals to achieve!"
A pair of women married to U.S. Border Patrol agents sent a letter to House Speaker Nancy Pelosi, inviting her to visit the Texas border with Mexico and see it firsthand, then understand why her opposition to a barrier was misguided.
The president questioned how anybody could believe he wouldn't deliver his long-promised wall on the southern border.
Florida senator opposes declaring a national emergency.