Look, the “two party system” is not a fixed entity. In theory, we could have three viable parties.
For example, let’s say the liberals on the West Coast got really angry at the Democratic Party and elected a bunch of Greens to Congress. Meanwhile, the liberals on the East Coast stayed loyal to the Democratic Party and sent their usual cadre of Democrats.
Of course, the president would most probably be a Republican, because the Greens and Democrats would split their votes on that office…and I think the Republicans would hold all the chairmanships in Congress since they would be the majority (again with split between Greens and Dems…someone correct me if I’m wrong on that one…are chairmans elected and therefore a coalition could develop? :shrug: ). However, together the Greens and Dems would hold greater voting power in Congress.
Now, chances of that actually happening? Slim-to-none. More likely, the Democratic Party would collapse and be taken over by the Greens - which is fine with me.