Edit: also, Democrat led states have higher land prices, so generally, percent based taxes like property tax will be nominally much higher and hit the SALT deduction cap quicker.
It disproportionately punishes richer people in states with higher taxes (usually Democrat led) compared to richer people in states with lower taxes (usually Republican led), giving more incentive for richer people in states with higher taxes to either vote for lower taxes in their own state (i.e. vote Republican), or move to a state with lower taxes (a Republican led state).