MICHAEL BARONE: Illinois’s Democratic redistricting–and how Republicans may respond. “The bottom line is that Republicans will have to hustle to offset the effect of the Democratic redistricting plan in Illinois, but that they will probably make a net gain nationally in redistricting, but not a large one—less than 10 seats. If that seems like a small gain to make after the big Republican sweep, especially big in state legislative seats, in 2010, it’s largely because Republicans already made big gains in the redistricting cycle following the 2000 Census.”