By Luc Cohen NEW YORK, Oct 9 (Reuters) - A US judge ruled on Friday that the Justice Department's push to obtain state voter rolls and check them against a federal immigration database to demand that states remove voters it deemed ineligible was unlawful.

When Justice Department staffers arrived in Minnesota this summer to monitor the state's primary election, they found themselves under scrutiny as well. Minnesota officials deployed about 40 state employees,

The US Department of Justice has filed more than thirty losing challenges to state administrations of elections, creating a Constitutional crisis.