https://www.frontpagemag.com/third-parties-dont-work/
Most people hate the political duopoly of the Democrats and Republicans (some people insist on calling it a Uniparty and while there’s a whole lot of corrupt and faithless pols, if you really can’t see the difference between the people calling for the abolition of ICE and those funding it, well…) but it’s hard to look at true multi-party systems elsewhere (or in American history) and think they’re better.
Most multi-party systems depend on parliamentary coalitions which we fortunately don’t have. To see why they’re so terrible, take a look at the trouble that Geert Wilders had in the Netherlands or Netanyahu in Israel. Parliamentary coalitions maintain a kind of political center that is forever sliding leftward. In other words, it’s everything you hate about our political system, but made much worse.
There’s the Latin American model, which we are moving toward, but that’s even worse for anyone who doesn’t like civil wars every other decade. (Jefferson did argue in favor of them.)
How would an actual effective third party work in America today? The two parties used redistricting to minimize the number of swing districts. Much of the public hates both parties, but running a candidate in any district would require competing against that district’s existing formulation. That means trying to beat either party in a district created just for its candidates. And running third party candidates in swing districts would most likely chip away at whichever two party candidate is likely to pick up independent voters. And that would likely end up favoring Democrats over Republicans.