Article V requires that any amendment denying each State equal representation in the Senate requires every State to ratify it and there never has been a time that was the case.
It has literally been the case with the 14th amendment as of 2003. Thats not a de-jure obstacle anymore. Its only a de-facto obstacle because we live in a Country where the court system is filled to the brim with activist judges who have no regard for following through with the laws set out by he constitution, especially in SCOTUS.
