The FBI has arrested a Milwaukee judge accused of helping a man evade immigration authorities. Friday's arrest escalates a clash between the Trump administration and local authorities over the president’s sweeping immigration crackdown.

The FBI arrested a county judge in Milwaukee on Friday, alleging that she obstructed the detention of an undocumented immigrant who was wanted by federal authorities, a senior law enforcement official told NBC News.

The FBI launched an investigation into claims that Judge Hannah Dugan helped an illegal immigrant evade ICE officers by misdirecting them.