President Donald Trump said he will support a pathway to citizenship for 1.8 million undocumented immigrants who came to the U.S. as children, according to a telephone briefing by the White House for Republican congressional staff members.

In exchange for relief for DACA recipients, the White House proposal calls for a $25 billion “trust fund” for a border wall, an end to family reunification, which conservatives call “chain migration,” and an end to the diversity visa lottery. Immigration activists blasted the plan for ending family reunification, and vowed to oppose it in Congress. “We are going to fight this tooth and nail,” said Frank Sharry, founder of America’s Voice, an immigration rights group.