Post random maps here

[traininthedistance]

Red states are states that voted for Obama & have a population density above the national average, blue states are states that voted for Romney & have a population density below the national average, green states are states that voted for Obama & have a population density below the national average, & yellow states are states that voted for Romney & have a population density above the national average. The shading is based on the overall population of the state, with darker states having a higher population.

I'm pretty sure North Carolina should be yellow here.  There's no way it's less dense than, say, Alabama and Kentucky.

[traininthedistance]

Still nobody wants to guess mine?

Wonder if someone will guess this one.

It's really tough.  The green bit seems to correspond to the Mississippi River watershed, so maybe something about physical geography, but then you also have light blue DC in the middle of the dark-red Mid-Atlantic, and aaagh.  No idea.

Also odd is that most of the country has what looks like a continuous range of shades, except for the west plus Florida which is just purple.  Which largely corresponds to areas that weren't in the USA in the period betweeen Louisiana Purchase-acquiring Florida, but then Puerto Rico and Hawaii would be purple too.