Migrants in Mexico who were hoping to come to the U.S. are adjusting to a new and uncertain reality after President Donald Trump began cracking down on border security.

Immigration and Customs Enforcement made 308 arrests Tuesday, Trump’s first full day in office, Border Czar Tom Homan told Fox News, similar to figures under the Biden administration, which made 282 daily arrests on average in September, the last month for which data is available.

Naser Zazai, 29, had planned to reunite with his mother and brother in the United States this week after fleeing Afghanistan, where he says he was threatened and attacked because his brother had once worked for the US military.