The first step to becoming a Christian is repentance. Without asking for forgiveness, there is no way to get there. When Trump said he had never asked God for forgiveness, that was not a good moment.
Many Protestants believe in the Grace of God. That he died for our sins and we have no need to ask for forgiveness. Forgiveness is just something we accept when we become a Christian. It’s believing in being “washed by the blood”