In case you missed it, five Democrat Senators threatened the US Supreme Court. They actually told the court to stay out of the NY York gun case. Why would they think that this assault on the court would go unanswered? Well Senator McConnell and the Republicans struck back.
All 53 Republican Senators signed a letter telling the court to stand strong. They saw this attack by the five as a direct assault against the court. They even used the threat of expanding the court if the court doesn't vote they're way.
Senator McConnell and the Republicans even have the support of Justice Ginsburg, who has no issues with the present court as is. In closing, the Republicans hit back and hit back hard.