US President Donald Trump said he will make an "important announcement" later on his Mexican border wall, an issue that has partially closed the government.
The closure, now in its fifth week, is the longest in the history of the United States and has left 800,000 federal workers without pay.
Correspondents say that Mr. Trump can offer a concession to the so-called Dreamers, who entered the United States illegally when they were young.
Before the speech, the rival democrats quickly described the expected movements as "unacceptable" and "uninitiated".
- Why has the United States government closed?
- Six ways the United States closes.
Mr. Trump is suing $ 5.7 billion (£ 4.5 billion) in funds for the wall and insists that it is necessary to end a security crisis on the southern border. The Democrats call it a waste of taxpayers' money.
When is the announcement and what could it include?
It will be from the White House on Saturday afternoon, although it has been delayed one hour at 16:00 local time (21:00 GMT).
Mr. Trump had a brief exchange with the reporters on Saturday morning, but he gave up little and said: "I think it will be an important statement."
David Willis of the BBC in Washington says Trump may be willing to offer a concession to Dreamers, who entered the United States illegally with their parents.
Dreamers are currently protected from deportation under a program that allows them to work but not obtain citizenship. Mr. Trump has been trying to rescind the program.
The sources told the US media that Mr. Trump can extend protection for Dreamers for three years and also extend visas for holders of temporary protection status. More than 300,000 people from countries affected by wars or disasters can live and work in the United States under the TPS, another system that Mr. Trump opposes.
Mr. Trump will continue to demand $ 5.7 billion for the wall, sources say.
They also say that it is unlikely that he will declare a national emergency on the wall.
Such a declaration would free up funds, probably from defense department spending, but it would be highly controversial and almost certainly generate legal challenges.
So, could this end with the closure?
Not if a statement by the president of the Democratic Chamber, Nancy Pelosi, is something to go through.
The statement said: "Unfortunately, the initial reports make it clear that your proposal is a compilation of several previously rejected initiatives, each of which is unacceptable and, in total, does not represent a good faith effort to restore certainty in life. of people".
The Democrats continue saying they will not negotiate until the government is reopened.
There is also no end to personal resentment. On Saturday, Trump said that Ms. Pelosi was "under the total control of the radical left." There are no planned conversations either.
Democrats are working on legislation to spend hundreds of millions of dollars on other border security issues, including the hiring of more immigration judges.
How is unpaid workers affecting the closure?
Some of the 800,000 federal employees who have been unpaid since December 22 are in an increasingly serious situation.
More than 1,500 appeals have been created by them on the crowdfunding website GoFundMe, seeking a line of financial aid to pay rent or feed and clothe their children.
In desperation, the Department of Agriculture, the Internal Revenue Service and the Federal Aviation Administration have withdrawn more than 50,000 employees, who must work without pay.