I agree with your assessment.
The individual States could require it under the 10th; but that is hardly the issue...
What a mess!
Liberals have long been infatuated with Parliamentary Government, because they long for centralized power. Parliamentary government is really monarchy whether there is a crowned head or not. The French Republic is monarchical even though it has no king. Canada and Australia are monarchies and will be even if they no long recognize the Queen. Our States are different in concept and history than Canadian provinces. One reason why Texas is so hated is that we HAVE a strong sense of separate identity, as Virginia and others once had. Liberals hate this, because they want to make Washington the Paris of America.