There's a hilarious infographic in Charles' Blow's op-ed piece in the Times called "Weight by State: Measure of childhood obesity and some contributing factors in states won by John McCain in 2008."
Which leads to the punchline/thesis of the article, which is "Maybe conservatives aren't attacking Michelle Obama's seemingly unobjectable anti-obesity campaign because they attack Michelle Obama reflexively, maybe it's because THEY'RE FAT."
which at first I thought was a little mean ("no, you're fat!" "no!! you're fat!") but keep in mind, Blow is attacking leaders who are taking a stand against important public health education.
I was a little surprised that I couldn't find any direct look at obesity rates among registered voters by party.