Oh no? How about the unconstitutional annexation of Western Virginia?
The president is not involved in the creation of new states.
"The consent of the legislatiure of Virginia is constitutionally neccesary to the bill for the admission of West-Virginia becoming a law. A body claiming to be such a legislature has given it's consent. We can not deny that it is such, unless we do so on the outside knowledge that the body was chosen at elections, in which a majority of the qualified voters of Virginia did not participate. But it is a universal practice in the popular elections of all the states, to give no legal consideration whatever to those who do not choose to vote, as against the effect of those, who do choose to vote. Hence, it is not the qualifed voters, but the qualified voters--who --choose--to--vote, that constitute the political power of the state."
Surprise, surprise, disloyal Virginians.
Now that's revisionist history if I've ever heard it!