Ranked Choice Voting (RCV) is Un-Constitutional, because it subverts the primary purpose of the Electoral College:
For each state to vote as a member of the college of states - a weighted system, so that less populated states have some representation.
That more equitable representation among the states, is of course, in contrast to the wish of the communists and socialists, that the President be chosen by popular vote - leaving California and New York states, plus about three more states, choosing the President.
Ranked Choice Voting (RCV) is Un-Constitutional, because it subverts the primary purpose of the Electoral College:
RCV may be unconstitutional in a presidential general election setting, but parties are free to choose what ever method they wish to choose their nominee.