Although President Trump mostly railed against illegal immigration during his campaign last year, his administration has put into motion a broad and unprecedented set of policy changes aimed at substantially limiting legal immigration.

On a recent afternoon, Giselle Garcia, a volunteer who has been helping an Afghan family resettle, drove the father to a check-in with U.S. Immigration and Customs Enforcement. She warned him and his family to prepare for the worst.

Wahidi helps run Afghan Hope Community Development, a volunteer-led nonprofit that assists Afghan refugees and families in the Sacramento, California, area. They’ve helped more than 5,000 Afghan families in the past five years, he says, and the fear spread almost instantly, and well before the shooting near the White House.