a feature i love about the NYT/Upshot polling project: the little link in each district write-up that takes you to a detailed map with the district outlined nytimes.com/interactive/20…
click on "this interactive map" and you get great context 
in #OH01 it's particularly useful because you can see how brutal the gerrymander is here; the city of Cincinnati is cut apart, and a huge almost-entirely-red county gets attached in place of the missing light-blue Cincinnati pieces
compare it to this map and you can see how the gerrymander divides up black neighborhoods in the same city so #OH01 can include sparsely-populated white voters in a different county demographics.virginia.edu/DotMap/
anyway, just a little political map break, showing a district where the point of the gerrymandering is much clearer when you view it in the context of what's around the district
a very nice feature, @Nate_Cohn
one more example here: the choice in #WI01, Paul Ryan's district, to cut the blue city of Beloit out of Rock County and pull the district north into the very red southern Waukesha County
