"I don't want POTUS to use his poltical power to 'take the nation back for christ.'"
Well, one thing that would need to be fixed is a Christian's eschatology and theology. If one believes that Christ is going to come back when things are "ready" for Him to come back, then there isn't going to be much you can do to thwart their voting decision These sorts of Christians are going to be called pre-millenialists. I would bet money that Huckabee subscribes, in some fashion, the pre-millenial eschatology. So, he in all likelihood believes that as a follower of Christ it is neccessary to do his part to help bring forth the kingdom of God so that Christ will hurry up and get here. If he does indeed believe in this form of eschatology, then it would make sense that he would want to "take the nation back for Christ". In order to change this position of his, he would need to fix his eschatology. However, any Bible believing Christian wants Christ to return soon.
As a Christian, who is an amillenialist rather than a pre-millenialist, I do have to say at least he is sticking to his principles. I'm no Huckabee supporter, but I can at least understand where he is getting his "take the nation back for Christ" remark.
Only Christ can take the nation back for Himself. He does need to get here, but Scripture clearly states (several times) that nobody can know the day or the hour that He will return. Only the Father knows. The last thing we should do is think we can do something that only God can do. That's called blaspheme and Christians ought not to do such things.