One of the mechanisms for beginning the amending of the USA constitution is via a 2/3 vote of both houses of Congress. The USA House of Representatives assigns political power approximately proportionally to population and it has never passed any proposed amendment to proportionally elect Senators or delegates of the Electoral College.
Source: Article V
Edit: Corrected 3/4 -> 2/3
Edit2: I stand corrected. The Bayh-Celler proposal was passed by the House and filibustered in the Senate in 1970.
Source: Article V
Edit: Corrected 3/4 -> 2/3
Edit2: I stand corrected. The Bayh-Celler proposal was passed by the House and filibustered in the Senate in 1970.
https://en.wikipedia.org/wiki/Electoral_College_abolition_am...