> States can leave the US with the consent of Congress.
No, they can't. The Constitution only provides for rules on forming new states and forming states from parts of other states. There is no text on what happen should a state decide it wants to live. In the Civil War, some states argued that the Constitution was a voluntary compact of sovereign states, such that a state could unilaterally leave if it so desired (no need to get consent of Congress). SCOTUS later held that these declarations of secession never held validity.
No, they can't. The Constitution only provides for rules on forming new states and forming states from parts of other states. There is no text on what happen should a state decide it wants to live. In the Civil War, some states argued that the Constitution was a voluntary compact of sovereign states, such that a state could unilaterally leave if it so desired (no need to get consent of Congress). SCOTUS later held that these declarations of secession never held validity.