I certainly agree that trashing the mortgage deduction (at least for large mortgages) is the right thing to do. But in really high priced areas, that's not the major thing driving costs - instead, costs are driven up by ridiculously constrained supply. Tax policy has little to do with this on a federal level.
"When I meet God, I am going to ask him two questions: Why relativity? And why turbulence? I really believe he will have an answer for the first." - Werner Heisenberg (maybe)