I don't think I could ever change my mind because my ultimate decision was based on blatant unrighteousness and ungodliness, not on political issues. The truth is, politically speaking, I don't care if we move or not move our embassy in Israel; I don't care if we build a wall or not; I don't care if we cut taxes or not; nor do I care if we block visitors from certain countries or not. I do care about war (as I have a 15 year old son and do not which him to be drafted as soon as he is 18 in order to fight a war); I also care about limiting or eliminating abortions and that marriage is between a man and a woman for life, however, President Trump is not a person who can authoritatively speak or represent either issue.
I think Christians need to be prophetic - not about political issues, but about the truth. Nathan rebuked David for truth. John the Baptist rebuked Herod for truth. In general, the prophets of the Old Testament had the job of keeping the king faithful to God, ethically, morally, and spiritually - but not politically, unless it crossed over into an area of a clearly Divine directive. For those of us in Christ, the only clearly Divine directive is to Love God with all of our heart, mind, soul, and strength and to love our neighbor. Of course, we can debate how these two things cross into our American political landscape, but there are some clear practices that are outside of God's will which we can all easily agree to. I can't support President Trump in such areas and I feel compelled to be clear and not subtle about this, regardless of the political agenda. Many evangelical leaders seemed to ignore this when supporting Trump during the election last year.
Thus, I could not change my position unless the President gained some emotional intelligence and he developed an overtly authentic faith where he could appropriately speak in the public square about his past sins and his future stance for truth.