It seems that every political faction uses this great hope to explain why they can win, but few actually deliver. Well, I'm tired of the argument. Mike Huckabee is the latest politician to reach for this argument. He's pulling it off the shelf as he tries to keep the GOP as socially conservative as possible, even after their losses in the 2012 election.
No dice, Mike. I don't believe you have an extra 6 million SoCon voters whom you can get to the polls. But more importantly, Allahpundit at HotAir runs the numbers casting doubt on this too (same link). He shows that the SoCons are voting in large numbers for the GOP candidate, those numbers haven't dropped, so a logical conclusion is that few SoCon voters are sitting it out.
Although I'd love to vanquish this type of argument for good, it's not easy to do. American elections typically have turnout of 60%, so large numbers of untapped voters definitely exist. That doesn't even include citizens who haven't registered to vote but would be eligible.
Obama is the only candidate I know who has actually succeeded in greatly increasing his votes through registration and GOTV efforts. There's always been more potential among Democratic constituencies for higher turnout, but Obama turned the potential into actuality where others haven't been able to. However, he's not going to hand his secrets or his organization over to the Democratic Party as a whole.
This doesn't bother me at all. If he's the one who built the machine and knows how to drive it, he should be the driver. It's all too likely that no one else can keep his machine in working order. Anyone who owns a Rolls would be crazy asking me to fix it, and lots of Dems are less savvy than I am, even the ones who've gotten elected. So, Mr. Obama, hang on to those keys. I hope you can keep your machine polished and in good working order. If others want to repeat your success, let them built a machine themselves.
Extras. Other views on why the GOP lost: