Tom Toles has long been one of my favorite cartoonists--but even I was a little stunned when I saw his latest work, which essentially says, don't vote Republican if you care about climate change. I'm not used to cartoonists being this directly political--but I'm also not sure I have any problem with it. In fact, I think the basic idea that Toles expresses is correct: There is a fundamental difference between the two parties on global warming. It's silly to shy away from that fact by citing the handful of Republicans that diverge from their party on this issue, or for that matter, the handful of Democrats who diverge. If you have to have 100 percent divergence on a topic across both parties before you can have a partisan issue, then there will never be any such thing as a partisan issue.