After New York state’s top court this week crushed Democratic hopes of coming out ahead in this decade’s redistricting cycle, the party faces an increasingly precarious legal environment in the hyper-partisan battle over drawing legislative lines.New York’s Court of Appeals on Wednesday overturned a map that Democrats muscled through the state legislature, deciding that a nonpartisan expert will instead draw the lines for the state’s 26 congressional districts.It was at least the fifth time this …