% of the 2012 vote to Obama/Romney against allocation of Congressman in the 2013-15 House of Representatives. I'll use the percentage of the vote won by Romney against the % of House seats won by Republicans in 2012.
This will only include states with 4 or more Representatives, and if the difference is larger than 10 points, I'll note it:
Republican "Gerrymanders"
Alabama: Romney 61%; Republicans 85% of the House seats
Arkansas: Romney 61%, Republicans 100%
Colorado: Romney 46%, Republicans 57%
Florida: Romney 49%, Republicans 62%
Georgia: Romney 53%, Republicans 64%
Indiana: Romney 54%, Republicans 78%
Kansas: Romney 60%, Republicans 100%
Kentucky: Romney 60%, Republicans 83%
Louisiana: Romney 58%, Republicans 83%
Michigan: Romney 45%, Republicans 64%
Mississippi: Romney 55%, Republicans 75%
Missouri: Romney 54%, Republicans 75%
North Carolina: Romney 50%, Republicans 69%
Ohio: Romney 48%, Republicans 75%
Oklahoma: Romney 67%, Republicans 100%
Pennsylvania: Romney 47%, Republicans 72%
South Carolina: Romney 55%, Republicans 86%
Tennessee: Romney 59%, Republicans 78%
Virginia: Romney 47%, Republicans 72%
Wisconsin: Romney 46%, Republicans 63%
Democratic "Gerrymanders"
Connecticut: Romney 41%, Republicans 0% of the House seats
Maryland: Romney 36%, Republicans 13%
Massachusetts: Romney 38%, Republicans 0%
New York: Romney 35%, Republicans 22%
Oregon: Romney 42%, Republicans 20%
So I've got 20 states where Republicans have the advantage, vs. 5 states where Democrats have the advantage. Distribute all these seats relatively proportionately to how each states Presidential vote looked, and suddenly their would have been a different Speaker of the House.
But let's be Politically Correct - both sides are just as bad.