Every Single Thing You Need to Know About Gerrymandering and Republicans

For some reason—boredom? coincidence? hot weather peevishness?—a bunch of bloggers today have been arguing about whether Republican control of the House is due to gerrymandering. I don’t get this. Gerrymandering is what it is. The best studies I’ve seen suggest that it accounts for 6-8 additional Republican seats. The rest of the Republican advantage is due to the incumbency effect; self-sorting; natural Democratic clumping in urban areas; and a few other minor things.

So: Is gerrymandering responsible for Republican control of the House? No. Is it partially responsible? Yes. What’s so hard about this?