Most humans change their minds, and presidents are not an exception. But they also consitute an special case, they were voted based on their promises (ideally) and if you go back on your word (or make things worse as I think is the case) there should be consequences. Or at least people shouldn't sit idle while being lied at.

I suppose the whole Center-Of-Attention-In-Washington-DC thingy might do a thing or two to your perception.

"Monarchy Where We Swap Out The King Every Couple Years" has a much less free ring to it than the almighty "Democracy", now doesn't it? Much more accurate though.

now that's something a politician would say

Mind-changing is great, as long as the person comes out and says, "I changed my mind because this and such, I previously thought X because of A, B, and C, but now because of D, E, and F I have come to see that Y is correct."

I can't recall ever seeing a politician saying it like this. They treat it more like a Ministry of Truth exercise wherein they pretend that they always believed Y.