I think the Dems are trying to spin this as another item in the "war for Democracy" when really it's just the SC re-affirming the constitution. It's also very conveniently timed to detract attention from the growing calls for Biden to step down after his less than ideal debate performance.
When an item gets put onto the political agenda list, it becomes polarized and if you are on Party A or Party B you immediately support or reject it based on affiliation with little thought.