U.S. officials arrested a Wisconsin judge on Friday and charged her with helping a man in her court evade immigration authorities in an escalating dispute between President Donald Trump's administration and local officials over immigration enforcement.

The arrest marks a significant escalation in the Trump administration's crackdown on immigration, as well as in its battles with judges across the country.

Veteran Milwaukee County Circuit Judge Hannah Dugan is under investigation by the FBI for allegedly attempting to help an undocumented immigrant avoid arrest, after ICE agents presented an administrative warrant to her courtroom.