The most popular third-party candidates would include individuals who already have a built-in constituency, as well as those who have a unique platform or message. Certainly, candidates from certain political backgrounds, such as Libertarians, Independents, Progressives, and the Green Party, could benefit from standing up and making a serious run for the highest office in the country.
Individuals who have had a successful track record in their professional and/or personal lives, such as business leaders, celebrities, scientists, or retired military personnel, could also catch on and mount a successful campaign. This is because these candidates have the potential to attract a diverse set of supporters who put their own interests aside and rally behind a shared cause.
No matter who runs, it is clear that the 2020 election cycle is ripe for third-party candidates. With the discontent that many American voters have with the current two-party system, a third-party candidate that is able to garner considerable support and build momentum could make a huge impact in the election results.