The Electoral College
The key reason it needs to be removed is that all it does these days is create 'swing states' that get all the attention of media and the two-party 'Walking Dead Mode' system of government we have now.
Your vote for my campaign will move this plan forward - big time - in that the winner of a Primary isn't guaranteed a win in November since a minor- or third-party candidate can win without all that political hassle of beating up the candidates from your own party - and giving your opponents in September/October plenty of reasons not to vote for the established-party candidate.