The chief of staff has also said the president's position on DACA - Deferred Action for Childhood Arrivals, which protects from deportation undocumented immigrants brought to the United States as children - had evolved. Kelly reportedly told the Congressional Hispanic Caucus that Trump's immigration policies on the campaign trail were "uninformed" and a truly border-length wall was unrealistic.
According to a Washington Post report, White House Chief of Staff John Kelly explicitly told Democratic lawmakers what the rest of us already suspected: President Trump was "uninformed" when it came to campaign promises he made regarding immigration reform.
"The Wall is the Wall, it has never changed or evolved from the first day I conceived of it", he wrote.
During his presidential campaign, Trump made it a mantra to promise to build a "beautiful" wall that would be paid for by Mexico.
"[Trump's] changed his attitude toward the DACA issue and even the wall", Kelly said, referring to the Deferred Action for Childhood Arrivals (DACA) program.
Still, Kelly insisted that the president has been committed to building hundreds of miles of new wall on the border as part of a deal with Democrats on immigration.
The fight over the fate of the "dreamers" - some 700,000 people who were brought to the U.S.as children and are now here illegally - is increasingly becoming a test of Democrats' progressive mettle, surpassing health care or taxes as the top year-two priority for the liberal base.
The president gave Congress six months to enact a replacement for the program, which protects about 780,000 young people.
Environmental risks dominate growing global concerns
Of the risks that could have the biggest impact to the world, after weapons of mass destruction, the next three are environmental. The cost of cyber-crime to firms over the next five years could reach $8 trillion, the WEF said.
The president's tweet came as Republicans and Democrats were scrambling to avert the shutdown, which could come at midnight Friday.
In an interview later with Fox News, Kelly said, "there are places where hydrographically, geographically, a wall would not be realistic". The president has shifted his tone on what the wall might look like, though.
Kelly instead explained that the US need only construct "700 more miles of barrier" and that "concrete wall would be good in only certain places". "And the President has said from the beginning, it's got to be bipartisan and unless it involves the House as well as the Senate, it's going to go down again as a bill that does not pass into law". And he sent word to Capitol Hill, where like-minded Republican lawmakers were summoned with minutes to spare to attend a White House sit-down with the crafters of the deal, who later claimed they were blindsided by the move.
According to the Post, Kelly said the Trump administration is pushing for increased border security because cartels are still managing to sneak their illicit drugs into the U.S.
He added that he had persuaded Trump that he did not need the wall and said the president's opinion on the once-sacred barrier had "evolved". "Campaign to governing are two different things, and this president has been very, very flexible in terms of what's within the realm of the possible". Tijuana is the largest city in Baja California, one of the six Mexican states with a border to the US. Protesters have rallied at offices of Senate Democrats, threatened primary foes for those who don't push hard enough for an immigration deal and promised to brand those deemed to have fallen short "the deportation caucus".
Kelly had struck a nerve with Trump by speaking out on immigration in particular. "That's what I understood, and all of that was helpful".
Rep. Scott Perry, R-Pa., another Freedom Caucus member, said he wants a vote on a conservative immigration bill written by Judiciary Committee Chairman Bob Goodlatte, R-Va., as well as a full year of military funding.