Are you trolling? Technically there exist other parties, but USian election rules (especially FPTP) are mathematically proven to cause such a huge spoiler effect that, even when a big fraction of voters hate both viable parties, electing a single third-party congressman is very unlikely, and electing a third-party president is nearly impossible.
It is like saying that the Earth is not round, because, strictly speaking, it is slightly bulged.
Are you trolling? Technically there exist other parties, but USian election rules (especially FPTP) are mathematically proven to cause such a huge spoiler effect that, even when a big fraction of voters hate both viable parties, electing a single third-party congressman is very unlikely, and electing a third-party president is nearly impossible.
It is like saying that the Earth is not round, because, strictly speaking, it is slightly bulged.
Third party candidates can affect an election by drawing off voters. Third party candidates can also present new ideas.
Third party candidates can draw voters from the party that is politically closer to them, thus helping the opposite party. That is the spoiler effect.