Republicans control all three branches of government right now and could pass a federal gerrymandering ban whenever they choose—but they won't. The real issue is that Republicans pioneered aggressive partisan redistricting, and now that Democrats are using the same tactics in response (like the Virginia referendum happening today), Republicans are complaining instead of solving the problem with legislation. The irony Cohen's pointing out is backed up by actual redistricting warfare: Republicans drew maps to flip seats in Texas and elsewhere, and Democrats are finally fighting back in states like Virginia where voters are deciding whether to flip four seats back.