I'd switch to a European-style Parliamentary system with Condorcet voting mandated in all elections.
What if we had a system where we had to take a test to go and vote? -a system where we would have to have a little larger knowledge about basic politics, than the most people, to be able to vote. In our present democracy everybody who's considered as an adult can go and vote.. I'm sure alot of people would agree with me that the qoute: ''most people are idiots'', is abvious with that democracy we're having. We chose with our hearts (which is stupid because this is politics... -we should use our brain). I think that's the reason people are voting the way they do. So many people vote without actually knowing what they're woting for. (I believe that they means do it in good faith. They just don't know better.. Politic is becomming more and more a kind of ''reality tv'' than actual POLITIC... kissing babies and stuff...) That's where i think our democrasy is wrong. I would like a world where we have to be able to actually come up with a good argument for the reason we vote the way we vote (I't should be annonymus ofc. But I don't know how to fix that.. PS. I'm not going to be one of the people in my world voting hehe reasons). I think we should go through some basic tests too, to see if we know basics about our community, and that we aren't against people only because of their Religion, Sex, Sexuality or Race or whatever they want to do (except hurting others physical/mental). I want a representative democracy where we vote for a certain odd number of people, like 115 or 233 or whatever.. I'm not smart enough to find out. Then we re-elect every year again.. or somewhat.. I'm not that smart.and then the politicans we chose make the laws and vote inten for what to use money on and stuff like that
I would keep the House, Senate, and President, but what I would change is that the positions would be filled by lottery. Every citizen would be up to serve, and by a random drawing you would have to serve the country. Now this would mean you'd get a cross section of the citizens, nobody could influence and election, nobody could buy an election.