If you could make a new law, or end an old one, what would it be?

I have many I would like to make:
1. No household can donate any amount of money over $500 to a politician or political campaign (down from $2000).
2. For the sake of fairness, a President must include three people from the opposite party in his cabinet, and Zell Miller doesn't count.
3. Gay marriage is now legalized. In all 50 states and U.S. provinces. No exceptions.
4. Any and all political ads must be proven factually accurate and non-deceptive by a genuinely non-partisan jury (if there is such a thing) before being aired.

And the laws I would like to repeal are basically the opposites of the laws I would like to enact (e.g. no lies in ads, no gay marriage bans, etc.).