"If we don’t change this legislation, if we don't get rid of these loopholes ... if we don't change it, let's have a shutdown," Trump said at a meeting with law enforcement officials on threats from the MS-13 gang. "I'd love to see a shutdown if we don't get this stuff taken care of."
"If we have to shut it down because the Democrats don't want safety, and, unrelated but still related, they don't want to take care of our military, shut it down,” the president added.
Trump released his plan for immigration reform last month and underscored it in the State of the Union address last week. His four pillars of reform include funding for the border wall, a path to citizenship for 1.8 million "Dreamers" eligible for protection under the Deferred Action for Childhood Arrivals policy, and an end to policies that offer visas through a lottery system or help family members obtain visas or green cards.
"I would shut it down over this issue," he said. "If we don't straighten out our border, we don't have a country, without borders, we don't have a country, so would I shut it down over this issue? Yes, I can't speak for our great representatives here, but I have a feeling they may agree with me."
Just as the president was calling for another shutdown, leaders on the Hill were touting that they are on the verge of a big spending deal to avoid it.
"I'm optimistic that very soon we'll be able to reach an agreement,” Senate Republican Leader Mitch McConnell told reporters, as the president was delivering his remarks across town.
Democratic Leader Chuck Schumer said they are "making good progress" on a deal that would increase military and domestic spending caps.
"I am very hopeful that we can come to an agreement and an agreement very soon," he said.
But when it comes to immigration, the two parties were nowhere near a deal, but no one on the Hill is talking about shutting down the government again over immigration. And even if the current spending deal fell through, there is bipartisan support for another stop-gap measure.
The president said he doesn't expect support from Democrats.
"You can say what you want, we're not getting support from the Democrats on this legislation," Trump said in response to Comstock.
Hoyer told reporters that inside those negotiations, Democrats were encouraged by Trump's expanding the pool of DACA-eligible recipients to people who did not initially sign up. He said that Kelly has not conveyed his message that the president won't extend the March 5 deadline.
The president has said he supports expanding the number of people eligible for protections under DACA to 1.8 million, a move Kelly called "stunning." But Kelly also said that DACA recipients could be "too lazy" to sign up to renew their protected status.
"690,000 official DACA registrants and the president sent over what amounts to be double that 1.8 million. The difference between 690,000 and 1.8 million were the people that some would say were too afraid to sign up, others would say were too lazy to get off their asses but they didn't sign up," Kelly told reporters from the Washington Post and Politico, according to those publications.
Rep. Peter King, R-N.Y., after the White House meeting on MS-13, made clear he holds a different view than Kelly.
"DACA people I know are pretty hard working," he said in a response to a question by ABC News, adding that he'd let the chief of staff speak for himself on whether that type of rhetoric is useful.
King also said he thought the president was talking about "the future" and not the present when talking about a shutdown, saying he doesn't think there's any need for one right now.
ABC News' John Parkinson and Mariam Khan contributed to this report.