I think one area which would alarm at least some homeowners paying a lot of property taxes as well as Mello roos-
“At the same time, the plan would eliminate the federal income-tax deduction allowed for state and local taxes — a provision that would hit high earners in high-tax states, including New York and New Jersey. The only itemized deductions that would be preserved under the plan would be for home mortgage interest and charitable contributions.”
I would definitely add CA to the list of states impacted by this. Not sure what are the chances something like this would pass, but if it does, it could hurt property prices.