^ Speaking of voting blocs that have been and are manipulated by political strategists, one of the many reasons that I stopped attending the conservative evangelical churches that abound here in Colorado Springs is because of the mentality that if you don't vote Republican, you are not a true follower of Christ.
See:
Evangelicals start soul-searching as prospect of Obama win risks Christian gains in politics
Evangelicals despair at prospect of Democratic victory | World news | The Guardian
I guess it all depends where one lives and the cultural surroundings. The fastest growing and largest Churches here are the more conservative user friendly, Starbucks, with a rock concert every Sunday ones described by path_of_one. Other mainline Protestant churches that are also growing are Presbyterian and United Methodist and a Missouri Synod Lutheran Church congregation. They were losing members to the Starbuck church crowd so they changed two of their Sunday services to more contemporary family friendly ones and they started attracting more members. Plus choice, choice, choice is very important..offer many interesting and relevant Adult Sunday School options and more people will attend.
This is what I have observed in my neck of the woods.