Bwahahahahahaha! What a galoot! The Constitution EXPRESSLY ['that no State, without its Consent, shall be deprived of its equal Suffrage in the Senate'] prohibits a state from being kicked out.
OK then, since you can't come up with anything in the Constitution that EXPRESSLY prohibits a state from being expelled why not try and wrap your 9 volt brain around what I suggested to your buddy? Don't think of it as one state being expelled, think of it as 49 states seceding from the 50th. Is that OK?
Think hard now. But don't hurt yourself.