In the electoral college, some voters are able to vote with three times the weight of others due to differing populations within districts that have equal college votes. Here is one source I found on Google, but the calculation is easy and there are plenty of other articles that reach similar conclusions:
https://theconversation.com/whose-votes-count-the-least-in-t...If you add in gerrymandering, it's the truth that most of our elections are "rigged" or "unfair" in a very real sense to anyone who believes in majoritarianism.