>>Just think, if Abraham Lincoln had thought that way, we would still have slavery.
That's a very ignorant retort.
I think I made myself clear in the remainder of my post where I explained that it is certainly within the rights of a president to openly disagree with court rulings that he sees as unconstitutional.
I see a very clear distinction between “upholding” the law and “supporting” that same law. While a president must uphold the law, he need not support it.