Hmm.. wouldn’t the court sign this out as unconstitutional?
I am sorry but this would require a constitutional amendment.
Of course it seems this threat is more than just legislative but of mob justice
There is nothing in the constitution that dictates how many Justices there should be. In fact it has changed a few times throughout history. The last change was in the late 1800s. So yes it can be changed rather easily by the Senate.
FDR tried to change it in the 1930s when the court ruled against parts of his New Deal. Back then even Democrats called him crazy. Of course, Democrats today would be more than willing to do this.
The Constitution doesn’t set the size of the Supreme Court. Congress could change it.