President Donald Trump has been testing the boundaries of his authority over US immigration policy since he began his second term of office, but he hinted at taking things to a new level when he said he’d support deporting US citizens to a prison in El Salvador.

Federal Judge Paula Xinis is at the center of the case of a Maryland man mistakenly deported to El Salvador by the Trump Administration that has emerged as a critical test of Trump’s aggressive crackdown on immigration in the United States.

Experts say President Nayib Bukele has the power but not the interest to return a man deported from Maryland to El Salvador in error.