dana: so the supreme court is hearing arguments today on whether maryland democrats unfairly redrew a congressional district map to favor the party in 2011. changes led to the ouster of ten term republican congressman rosco bartlett. maryland is just one of seven states that has seen court battles over its redistricting in this election cycle. let s bring in chris stirewalt. jerry manering is something people say is at the root cause of polarization. do you think it s a big deal? i think in 2018 everybody always ought to take a chill pill because we keep it at 11 all the time. some things are only a 7. that s okay. look, gerrymandering makes us dumber, makes our politics dumber. what it does, it incentivizes extremism. there s no question about that.