Harold Meyerson points out one of the problems with touting your party or candidacy as the “Christian” one: people will start to actually expect you to live up to the standards of Jesus.

Here’s something C. S. Lewis had to say about the idea of a “Christian” political party:

It is not reasonable to suppose that such a Christian Party will acquire new powers of leavening the infidel organization to which it is attached. Why should it? Whatever it calls itself, it will represent, not Christendom, but a part of Christendom. The principle which divides it from its brethren and unites it to its political allies will not be theological. It will have no authority to speak for Christianity; it will have no more power than the political skill of its members gives it to control the behaviour of its unbelieving allies. But there will be a real, and most disastrous, novelty. It will be not simply a part of Christendom, but a part claiming to be the whole. By the mere act of calling itself the Christian Party it implicitly accuses all Christians who do not join it of apostasy and betrayal. It will be exposed, in an aggravated degree, to that temptation which the Devil spares none of us at any time–the temptation of claiming for our favourite opinions that kind an degree of certainty and authority which really belongs only to our Faith. The danger of mistaking our merely natural, though perhaps legitimate, enthusiasms for holy zeal, is always great. Can any more fatal expedient be devised for increasing it than that of dubbing a small band of Fascists, Communists, or Democrats ‘the Christian Party’? The demon inherent in every party is at all times ready enough to disguise himself as the Holy Ghost; the formation of a Christian Party means handing over to him the most efficient make-up we can find. And when once the disguise has succeeded, his commands will presently be taken to abrogate all moral laws and to justify whatever the unbelieving allies of the ‘Christian’ Party wish to do. If ever Christian men can be brought to think treachery and murder the lawful means of establishing the régime they desire, and faked trials, religious persecution and organized hooliganism the lawful means of maintaining it, it will, surely, be by just such a process as this. The history of the late medieval pseudo-Crusader, or the Covenanters, of the Orangemen, should be remembered. On those who add ‘Thus said the Lord’ to their merely human utterances descends the doom of conscience which seems clearer and clearer the more it is loaded with sin.

All this comes from pretending that God has spoken when He has not spoken. He will not settle the two brothers’ inheritance: ‘Who made Me a judge or a divider over you?’ By the natural light He has shown us what means are lawful: to find out which one is eficacious He has given us brains. The rest He has left to us. (from “Meditation on the Third Commandment,” in God In the Dock)