What this means is that Democrats probably have to win about 55 to 56 percent of the statewide vote to win control of the state assembly. Or to put it differently, Republicans need only win 44 to 45 percent.

Lots of election results are simply unlucky. This is not one of them. The plaintiffs are right that Wisconsin’s legislative districts were drawn in a way that discriminates against the state’s Democrats by systematically diluting the value of their votes in every election.

– from research by Jonathan Krasno, Daniel Magleby, Michael D. McDonald, Shawn Donahue and Robin Best looking into the argument being made by the Wisconsin Democrats’ federal lawsuit