Prohibit contributions from outside the district or state to be represented. Dump the Electoral College from the presidential election process. It's obsolete and only gives the public one more reason not to vote. Presidential elections should be won or lost entirely by popular vote. Pass a constitutional amendment limiting the terms of politicians.
Term limits remove much of the incentive for corruption and power hoarding.
Prohibit unions from using dues to pay for ads attacking candidates of a particular party affiliation. I suspect Republicans who belong to a union don't appreciate their money going to defeat candidates they support. Apply truth in advertising laws to political advertising. End the publishing of election polls a month before an election. Polls are a lazy way of reporting the news.