https://en.wikipedia.org/wiki/List_of_third-party_and_indepe...
https://en.wikipedia.org/wiki/List_of_third-party_and_indepe...
Decreased voter participation would signal a growing lack of faith or trust in the two major parties. That can open doors for fund raising for third parties, because they now can point to a percent of the population that historically did vote and stopped. Similarly, it would open doors for gaining support and votes because they can make the same argument to voters - 20% (or whatever the decrease is) of voters gave up on both parties. Join our party if you lost faith in the others, and in a 3 way race that puts us very much in the hunt for fundamentally shaking up the system we have today.
This isn't just an opinion certain voters have, it's the truth. A vote for anyone other than one of the two parties with the best odds of winning is a "wasted vote" in the sense that when the third party candidate voted for doesn't win (and they almost certainly wont) that vote can't go to support anyone else. Our voting system makes that true.
The only way a third party could ever win in under our current system would be if they managed to get a massive majority of the voters to vote for them, and a massive majority of the voters knew that the third part was going to be getting a massive majority of the votes before anyone voted.
It's extremely unlikely that a third party could gain that much support. Especially because elections in the US tend to be pretty close. The best any president has ever managed was something like 60% of the popular vote.
Trump basically did just that and Bernie Sanders came close.
The US does not have successful third party runs because of the uncertainty and difficulty of getting onto the ballot, the possibility of getting onto enough ballots that you will harm your allies but not enough ballots to win, and the fact that the electoral college means you can't rely on running up the vote in your home regions in order to get yourself into the running on a national level. It's not FPTP that prevents third party presidential runs in the US, but state electoral administration, state primaries, and the electoral college.
In any case, the effect is the same. It doesn't matter why the US only has two major candidates at this presidential election and the last presidential election and the next presidential election. It just matters that the US only has two major candidates at this presidential election and the last presidential election and the next presidential election. Abstention is nothing more than half a vote against the candidate closest to you. It's not a motivator for an extra candidate to run next time.
In this reading, the National Popular Vote Interstate Compact will probably have a bigger consequence than Ranked Choice Voting, because it will allow candidates to run up the vote in home regions, which will create new paths to the White House. Ranked Choice Voting just allows voters of the least favored candidate to make a protest and then come home. If you had had Bernie, Biden and Trump running at the last election with RCV, then Biden would have won if Bernie voters had preferenced him, and Trump would have won if they didn't. There's no actual alternative in which Bernie wins. So why would you stand if you're guaranteed to lose? It costs money and burns bridges. The extra candidates want a lower hurdle to winning (for instance, 38% in a field of four), not a higher hurdle (like 50%+1 in a field of four).
The consequences are different at the level of an individual district, because a member of Congress is a very different role than a national president.
From a country with Preferential Voting: you run to make preferencing deals that benefit the people that vote for your particular ideals.
It's on the record that X% of the popuation support the stance you take.
Further, it goes all the way to the houses and breaks the party stranglehold; Australia has 10 Independents, more than Canda, the US, and the UK combined.
Politics shoud be about more than "a little king" as POTUS, it should be about the house reflecting the proportional views of the population and weight being given to views represented and the deals that aligned views can make together.
The US FPTP system was doomed (from an iterative dynamic system perspective) to devolve into a two party non representative end game despite the express opposition of many Founders to Party Politics. It's what happens when a poort voting system is scaled up over centuries.