The move is an escalation of the clash between the Trump administration and local officials over deportation efforts.

Judge Hannah Dugan was arrested on suspicion that she “intentionally misdirected federal agents away from” an immigrant being pursued by the authorities, the F.B.I. director said in a social media post.

The Federal Bureau of Investigation has arrested Milwaukee County Circuit Judge Hannah Dugan, according to a social media post from FBI Director Kash Patel.