The historical precedent is that FDR tried it, and raised such a shitstorm that he abandoned the plan. The Supremes also helped him by changing a vote (“the switch in time that saved nine”) to take the pressure off him from his base.
What Democrats and Republicans both fail to understand is that the other side gets a say, and unintended consequences abound. For example, one of the reasons you got Trump in the first place is because Democrats treated Mitt Romney like he was a Trump. So Republicans said, “Well, if you are going to treat Mitt freaking Romney like a monster, let’s see how you like THIS guy.” At the same time, the toxicity of Presidential politics (of which both sides are guilty) has scared away normal people of accomplishment and left the field to grifters, sociopaths, narcissists and idealogues. The odd decent person like Tulsi Gabbard gets squashed in that environment.
The international left tried to stir up revolution in Germany. They got Hitler instead. The right puts up Trump to ‘own’ the libs. Now they have a bumch of hard-left firebrands in Congress to deal with and are facing the loss of maybe the House, Senate, and Presidency. And now the Dems plan to take it up another notch.
Did you ever think what might happen if you pack the court, then the Republicans come back in 2022 riding a wave of public anger and win the House and Senate back, with no legislative filibuster? Or was your thinking that you’d pack the court and then use the opportunity to rig the game so you never lose again? Have you really thought this through?
Or for that matter, does it bother you that by normalizing court packing and ending the legislative filibuster you have just given Trump massive weapons if he pulls off another upset win?
What do you do if in 2024 President Haley responds to packing the court with four liberals by packing it with eight more conservatives? Who are you going to complain to, the Supreme Court?
And if Biden packs the court and then uses that to pass something the right hates such as gun bans or abolishing the electoral college so the middle of the country never gets a say in politics again, do you think they will see that as a legitimate use of power? You’re risking nothing less than destroying the country by going that way.