The only way a third party will ever be viable in a first-past-the-post system is if you infiltrate one of the two real parties and get enough candidates elected who have pledged to replace the FPTP system that got them elected and replace it with something that makes it a viable decision to vote third-party, such as ranked-choice voting.
The only way a third party will ever be viable in a first-past-the-post system is if you infiltrate one of the two real parties and get enough candidates elected who have pledged to replace the FPTP system that got them elected and replace it with something that makes it a viable decision to vote third-party, such as ranked-choice voting.