To some this will seem like concern-trolling, and to others it will seem stupid, but hear me out and see what you think...
politico.com/news/2020/03/3…
But as everyone knows, this is a recipe for disaster. Remember Nader? Third party candidates throw presidential elections to the opposition. It's a law of politics.
en.wikipedia.org/wiki/Duverger%…
In CONGRESS, third parties work just fine.
The Social Democratic Party could cooperate with the Democratic Party in Congress. Parliamentary coalisions don't choose the chief executive, but they work in Congress.
The GOP won the Presidency in 1860, but it first went after Congressional seats in 1854. And won many, even as the Whigs continued to exist.
en.wikipedia.org/wiki/34th_Unit…
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