WASHINGTON (REUTERS) - Congressional Republicans on Friday (Jan 5) downplayed the likelihood of a deal soon with Democrats on saving 700,000 young, undocumented US immigrants from being kicked out of the country in March, a possibility created by President Donald Trump.

Trump in September ordered an Obama-era programme that provided the young "Dreamer" immigrants with work permits and prevented them from being deported to end in six months.

The programme is known as Deferred Action for Childhood Arrivals, or Daca.

Despite his order, the Republican president has vacillated in his view of the Dreamers.

Young people brought to the United States as children illegally and raised and educated in the country, most of them have little or no experience of their parents' homelands in Latin America, Asia, Africa and elsewhere.

Saving the Dreamers is a high priority for Democrats, but the issue has been swept up in other debates, including one on the wall that Trump wants to build along the US-Mexico border.

Republican Senator John Cornyn, in a tweet on Friday, accused Democrats of trying to force a deal on Dreamers by doing a "slow walk" on efforts to approve critical disaster aid and defence spending.

Two other Republicans late on Thursday said both sides remained far apart.

"Our discussions on border security and enforcement with Democrats are much further apart, and that is key to getting a bipartisan deal on Daca," senators Thom Tillis and James Lankford said in a statement.

Democrats have said they are open to tying Daca to additional funding for border security technology. But they oppose Trump's wall, projected to cost over US$21 billion (S$27 billion).

The struggle over the Dreamers carries political weight for both parties heading into the November 2018 midterm congressional elections. Most of the Dreamers came from Mexico and Hispanics tend to vote for Democrats, who hope to gain seats in the Senate and the House of Representatives.

Republican lawmakers met with Trump at the White House on Thursday and initially emerged saying they were optimistic that they could find a legislative fix for Daca.

On Friday and Saturday, Trump and senior Republican congressional leaders are also likely to discuss the issue at a conference held at Camp David, the US president's mountain retreat in Maryland.

A meeting between leaders of both parties was set for Tuesday.

Cornyn, in an interview on Fox News on Friday, said Trump would demand that an immigration deal address the current visa lottery system and chain migration that unites family members.

"Those are things that he's insisted upon," and Democrats would have to embrace them along with border security, said Cornyn.