Yes and whenever someone points out that Article I forbids states from entering into treaties or confederations with other states without Congressional approval you all scratch your heads and say, "Golly gee whiz, if a state secedes it isn't bound by the Constitution anymore." Well, if a state is expelled then they aren't in the Union anymore, not bound by the Constitution, and not protected by it. You all are constantly quoting the 10th Amendment saying that the right to unilaterally secede is granted to the states because it is not denied by the Constitution. Well, show me where the Constitution says the states cannot join together and expel a state if they choose to do so.
Article V. Psst.... We've been here before.