It means someone who uses the campaign trail as a pulpit.
Alternately, it could be someone who feels it necessary to do things like ban birth control on a federal level, or make online gambling essentially illegal. These are things that you can choose not to do to live a virtuous Christian life, but are not the domain of government.
Modern-day conservatism, which is to say, conservatism over the last 8 or so years...has become “be pro-life/socially conservative and that’s all you need” which results in, basically, pro-life, nanny-stater socialists.
This turns off the part of the Republican Party and the more libertarian part of the conservative movement that is more concerned about fiscal, economic, small-government, and, even defense issues.
Christianity doesn’t trump the freedoms in our Constitution. In fact it serves as the very basis of the Constitution, but not in the sense that the government needs to “legislate morality,” but rather that a free society thrives on people who exercise personal morals. Will everyone exercise them? No, and they shouldn't be "forced" to do so by government.
Dayum, you’re good!