They will all change. Not because he is a liar, but because that is how he negotiates. People have brought this up before, but his initial position is so extreme (most of the time) that having him budge at all mind fucks his opponents. They immediately think they beat Trump and talk more about what they got him to move on than focusing on the reality of what he gets. In fact, many of here pointed out his statements. There were 1980's- 90's -2000's pre trump remarks and then election Trump. People need to feel like they got something and Trump is going to abuse that feeling IMO.