You say gerrymandering doesn't help the GOP, then link an article which describes how gerrymandering has allowed for the complete and uncontested domination of

You say gerrymandering doesn't help the GOP, then link an article which describes how gerrymandering has allowed for the complete and uncontested domination of half of the legislature by the GOP for over a decade. That's not what the article says. At one point it suggests gerrymandering is good for maybe 6-8 GOP seats (and it's not clear that counts any offsetting gerrymandering in Democratically controlled states). Much of the rest of the GOP "lock" on the House is described thusly: Even so, “by far the most important factor contributing to the Republican advantage,” Mr. Chen says, “is the natural geographic factor of Democrats’ being overwhelmingly concentrated in these urban districts, especially in states like Michigan and Florida.” Which is exactly what I said.