Okay but you know expanding the court is a nuclear option. Like the current place we are in is there are 6 "conservative" judges and 3 "liberal" ones. So you would need to introduce 4 new supreme court justices at minimum to upset the current balance. While you are sort of ignoring the Senate has 49 republicans, 48 dems, and 3 "independents". So who again confirms supreme court justices? Oh yeah senate.... This is also ignoring you would have to make a new act to set the number of supreme court justices to 13 and who has majority control over house again? So lets fast forward to some future where dems have unquestionable control over the legislative branch of government where they can't be filibustered down. What exactly stops conservatives from just increasing that number once again to 18 or so when they have control?