There is a sixth way to unseat the President: create a partisan Independent Counsel investigation, staff it with Democrats, and when nothing is found about the President, invent something with which to indict him.
By the way, “upwards of 50–60 million minority voters unable to cast a ballot in the 2016 election” because of “voter suppression” is absurd. There are only 169 million registered voters in the US, 86 million of whom are Democrats (where presumably those 50–60 million minority voters would be). That means two out of three registered Democrats are minority voters and all of them were unable to cast ballots because of “voter suppression”. You must think your readers are all gullible idiots.