Hmmm, very nice

Since lvl 10 construction gives 100% time reduction.
Base_time * .995^ (stat) = real time.

My guess is, your politician is around 500 pol. That's some crazy leveling you've done, providing you don't use that +25% pol item (which my guess you are using it, so ur politician is around 370s base pol).
Anyways, that's a nice mayor. Congrat!