Maybe it's a function of where I live, but I know lots of people who might describe themselves as the Christian left. Maybe part of the problem is that you seem to be using the term "evangelical" and "churchgoers" as synonymous, which they're not. The churchgoers I know who will overwhelmingly be voting Democratic this fall would agree with neither the theological interpretations nor politics of people who describe themselves as evangelicals.

I think that "evangelical" is getting confused with "fundamentalist." Evangelicals believe in getting out there and preaching to the masses, that's really their only common denominator. They can be either conservative or liberal, it makes no difference. The Catholic Church is a good example, believe me we have our "liberal wing" that's pro-Union, anti-war, pro-stewardship, environmental and all about social justice. And yes, of course we have our "fundamental" wing, too. We shouldn't be defined strictly by our stance on birth control, there's alot more to the Catholics than just that.

I think there's a lot of crossover between "evangelical" and "fundamentalist", but you're right, they are not always synonymous.

The problem is, conservative Christians have defined themselves entirely by a narrow set of issuse like abortion and gay rights, to point where they've begun asserting that you're not a "real" Christian unless you vote according to their particular doctrine on those issues. Many have even preached that voting democrat will put your soul in peril. That's not exactly fertile ground for the dems to reach out to that group, especially when these CC's are willing to put aside their views on every other issue just to make sure that they vote pro-life/anti-gay.