Looks like there is a movement to unite the independent left under one party or at least one leadership. Howie Howard is all but guaranteed to win the ticket for the Green Party, and got also selected the Socialist Party USA as their nominee.
And if I would be american and live in a state where I could vote for him, I would do so.
I think they should implement ranked choice voting. Doing so would would allow you to vote without throwing away your vote. And, I'm fairly certain that an individual state could elect to do that on their own without the feds input.