Mann was appointed yesterday after a three-judge panel denied a request from state lawmakers to dismiss a challenge to their proposed new district lines, which was filed by voters in Brooklyn.
Roanne L. (Ronnie) Mann, the magistrate judge assigned yesterday to oversee the state’s redistricting process, is a registered Democrat, according to city records, and a “very smart, but humorless jurist,” according to an attorney who spent years dealing with her in one high-profile case.

