The most widely used definition of treason is: the crime of betraying one's country, especially by attempting to kill the sovereign or overthrow the government. A lesser used definition is: the action of betraying someone or something. Your context is using the lesser used definition as in the betrayal of the Constitution. However, the crime of treason is associated with the first definition. So long as someone doesn't attempt to overthrow the government or advocate for its overthrow, they won't be considered to have committed the crime of treason. Wanting to change the Constitution or even denying what it says is not treason from a criminal standpoint. Those who deny parts of the Constitution that don't suit them or find things in the Constitution that are not there are unfit to hold office or even vote in my opinion, but they have not committed the crime of treason for their willful disregard of the law.