If the US were a democracy, each state would have its number of senators based upon population, the president would not have veto powers or powers of executive orders, senate filibusters would not be allowed, and congressman and senators would have to conduct polls of their constituents before voting on a bill.
And, if all of the above were the case, the US would not have a military, every household would have at least one large-screen TV as well as two new cars, heads of corporations would be paid the same as burger-flippers, and the US would be a third-world country.
And, oh yeah, Gena Davis would be the president.