Former NFLPA executive director De Smith's upcoming book, Turf Wars, includes an account of a 2020 argument between Aaron Rodgers and Kirk Cousins over whether the proposed CBA should be sent to all players for a vote. Cousins won, and the CBA was passed.
https://www.nbcsports.com/nfl/profootballtalk/rumor-mill/news/upcoming-de-smith-book-includes-account-of-cba-argument-between-kirk-cousins-aaron-rodgers