In the absence of redistricting in 2012, the difference between the number of seats republicans won and the actual total would have been no more than 7. In other words, they would nevertheless have retained a solid majority.
http://themonkeycage.org/2012/11/14...rity-of-the-vote-and-a-minority-of-the-seats/
There is clear and convincing evidence that gerrymandering is not the sole force at work in this phenomenon, and ample evidence to suggest that it is not the driving factor. It is widely understood among political scientists that electing the House by single member voting districts disadvantages Democrats because of the way they are geographically concentrated. I encourage you to read through this link and the one I posted previously.
Democrats " ‘waste' votes on huge margins [in cities], when the party could put many of those votes to better use in marginal seats."
"Even under the most generous assumptions, redistricting explains less than half the gap between vote share and seat share this election cycle."
http://www.motherjones.com/kevin-drum/2012/11/gerrymandering-not-big-deal-you-think
"Bottom line: gerrymandering isn't nothing, but it's not a game changer. It's not the real story here" (And this is from Kevin Drum! Writing in the left-wing rag, Mother Jones! No ridiculous accusations of Glen Beck fanboyism this time, okay?)
A question I'd pose to you is, if Republicans are so unpopular (they aren't), why do they control 29 governor's mansions, and 67% of all state legislative chambers, which gives them the ability to gerrymander in the first place? Furthermore, every time this argument comes up, the sore losers always cry foul. Then as soon as they're in power again, they use the exact same tactics. Same argument applies in reverse to cloture and the filibuster. Your beloved white knights of liberal progress in Illinois worked their tails off in 2012 to draw the map in that state as favorably as possible for their party, and to great success.
I'd call this argument facile,
but I can only assume you'd mention your age and how many interviews you've gotten as a QED.