The Maryland construction worker became the face of President Donald Trump’s hardline immigration policies when he was wrongfully deported in March to a notorious prison in his native El Salvador.

Kilmar Abrego Garcia, the Maryland man who was unlawfully deported to El Salvador earlier this year, will gather with members of his family, immigration activists, community leaders and elected officials at a rally in Baltimore on Monday morning as the Trump administration warns it could send him to Uganda as soon as this week.

Kilmar Abrego Garcia surrendered to U.S. immigration authorities in Baltimore Monday and faces possible efforts by the Trump administration to deport him to Uganda, an African country with documented human rights abuses and a language he doesn’t speak.