Attorney David A. Robinson submitted the first amicus brief supporting challenged assault weapon bans ahead of Wednesday. He spent roughly $6300 promoting a book and proposed 28th Amendment then contacted Congress, Joe Biden, Kamala Harris and Donald Trump without gaining support, so he asks justices to declare the Second Amendment prefatory clause extinct limiting the right to self-defense and hunting. The brief uses an invented exchange with nine-year-old Jane about AR-15s and analogizes magazine restrictions to speed limits.