There was an article a few weeks back about this topic: http://www.cnn.com/2015/07/18/politics/trump-has-never-sought-forgiveness/
The exact comment that people refer to was this bit:
Moderator Frank Luntz asked Trump whether he has ever asked God for forgiveness for his actions. "I am not sure I have. I just go on and try to do a better job from there. I don't think so," he said. "I think if I do something wrong, I think, I just try and make it right. I don't bring God into that picture. I don't."
You know, God can use anyone. The lesson in Daniel is God, not man, raises up and takes down kings and kingdoms. God used Nebuchadnezzar BEFORE Nebuchadnezzar came to believe. I believe Trump in the same way will become a believer (but I hope he doesn’t have to go insane to get there).