2018?
In my line, I shouldn't be cynical (but I am). No politician that I know of plans for anything beyond winning at the next election.
Only statesmen plan for the long-term, and we have none of those right now (as far as I can tell).
Airports are long-term things. Building houses on airports is a short-term thing.
I agree 110% that we need to preserve the airfields we have (because there aren't many suitable places to build new ones, and my Boss isn't making new land any more).
So join AOPA and/or GAAC and/or A4A and see if you can make a difference.