It's not secularism, it's urbanization.
The numbers in urban areas grow ever greater, and their need/use/tolerance for firearms ever wanes.
More House of Representatives coming from urban areas every census. No gun love there.

Romney's Mormonism was made as small an issue as possible. It was his candor about the non-producers that sunk him.

I know of NO evangelical whatever's that chose not to vote in the last election. Additionally, I have seen no results sifting that showed any state that turned democrat because a church goer was mad.
People need to move past that notion. It's an easy one to hold on to, but it's not accurate.

Oh, and voter fraud. That one's a loser too. I wouldn't hinge my beliefs on that one either.

Good candidates, good messages, simple action plans.
Do that.
Don't force candidates to submit to 40 weird litmus tests before you'll vote for them either. It's counterproductive.

Out there doing it best I can.