[magpi3]

I remember, but that wasn't really a third-party. That was just Ross Perot. I do think the two parties are slightly vulnerable to a strong enough, and rich enough, candidate surrounded by a cult of personality, but even in this case it would have been wiser had Perot simply challenged for the Republican nomination like Trump (another outsider) did 24 years later. He probably could have ousted Bush, and he really might have a won the presidency that way.

[SahAssar]

If en marche didn't win in france that would just have been one guy. Every party seems to be just one guy until it actually gains enough momentum an power to grow outside of that person and has to build an organization that survives them.