I see no reason why Senate Democrats would vote for this. It would be giving more electoral votes to a red state and taking them away from a blue state, as well

I see no reason why Senate Democrats would vote for this. It would be giving more electoral votes to a red state and taking them away from a blue state, as well as setting precedent for red-leaning parts of other blue states to do the same. 60 votes is a lot in a split Senate.