President Trump tweeted Friday against "chain migration" in immigration laws, amid debate on a permanent legislative solution for the Deferred Action for Childhood Arrivals (DACA) program.

CHAIN MIGRATION cannot be allowed to be part of any legislation on Immigration! — Donald J. Trump (@realDonaldTrump) September 15, 2017 "CHAIN MIGRATION cannot be allowed to be part of any legislation on Immigration!" Trump tweeted.

ADVERTISEMENT "Chain migration" is a term used by immigration hard-liners to describe the family-centric immigration system currently in place. Under the current system, U.S. citizens can petition for their foreign spouses, parents and unmarried children under 21 years of age to become permanent residents.

The tweet comes amid debate on a potential deal to replace DACA, which Trump rescinded last week.

But Trump Thursday said no deal had been reached and seemed to link a DACA solution to the construction of his proposed border wall — a no-go for Democrats.

That left Democrats uneasy, questioning both Trump's reliability as an interlocutor and his grasp on the basic concepts behind the issue.

Meanwhile, Trump was blasted by right-wing media for negotiating "amnesty" for undocumented immigrants.

Trump Thursday denied that he discussed a pathway to legal status with Schumer and Pelosi, but the Democrats' preferred bill, the DREAM Act, would give undocumented immigrants residency with a means of gaining citizenship.

“We’re not looking at citizenship. We’re not looking at amnesty. We’re looking at allowing people to stay here,” Trump told reporters on Air Force One Thursday .

By shifting the immigration discussion toward chain migration, Trump gave a nod to a Republican immigration proposal, the RAISE Act.

Trump endorsed the proposal, which would also cut legal immigration in half, at a White House event last month.