I think what you're hearing is, um, not very well informed or balanced reporting.
In my state, WA, our legislature passed a same sex marriage bill, the governor signed it into law, and though it will likely face a referendum challenge this fall, current polling indicates it will stand, 55-45.
Even in the Republican primaries, which are much more conservative than the general public, the Religious Right's fair-haired boy, Santorum, put up a good fight but was ultimately defeated by the moderate conservative Romney.
I do think it likely Republicans will take the White House this election, increase their margins in the House, and possibly retake the Senate... but that will be because of the continuing poor economy and lack of confidence in Obama's ability to improve it, not because of religious or social issues, and certainly not because of any groundswell of fundamentalism.