Immigrants brought to the U.S. illegally as children are the latest target of the Trump administration's mass-deportation campaign, and the future of the Obama-era program that has protected hundreds of thousands from removal — Deferred Action for Childhood Arrivals, or DACA — is increasingly in peril, advocates say.

Recent arrests of immigrants with DACA protection, including a 27-year-old Arizona man arrested by Yuma border agents this month, have spurred outrage and will likely lead to a legal showdown, possibly in the nation's highest court, legal experts said.

In Tucson, Arizona, advocates are fielding calls from worried DACA recipients amid the recent arrests, said Carolina Silva, executive director of Scholarships A-Z, a nonprofit that supports undocumented youth and those with

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