“Zero chance” DOJ will approve LA redistricting with reduction in minority seats?

A curious article today in NOLA.com with this quote:


“The U.S. Justice Department generally has interpreted the federal Voting Rights Act of 1965 to forbid reducing the number of districts where minority voters constitute a clear majority of residents. Tucker said attorneys from Justice’s Civil Rights Division don’t give explicit guidance in advance, but he said there was ‘zero chance’ that federal authorities would approve maps that reduce the number of majority-black districts. “

Hold on a second.  Zero chance?  What of the massive Katrina exodus out of the state?  What of natural retrogression?  Is Tucker just saying this, or was he told this?  One must presume the former because the latter would be contrary to the law and common sense.