The US government is currently inhabited by one political Duopoly, the RepubliCrats, who cater to the interests of the 0.001%, who keep us divided. It's been that way since at least 1970, if this set of interviews from 1970 is to be believed[1]
This is a well established fact and the main reason why the voting system needs an overhaul to allow for ranked choice or something similar.
Chances of Duopoly parties doing that by their own are 0% - so it has to be the people.