Furious Democrats are considering total war — profound changes to two branches of government, and even adding stars to the flag — if Republicans jam through a Supreme Court nominee, then lose control of the Senate.

On the table: Adding Supreme Court justices ... eliminating the Senate's 60-vote threshold to end filibusters ... and statehood for D.C. and Puerto Rico. "If he holds a vote in 2020, we pack the court in 2021," Rep. Joe Kennedy III (D-Mass.) tweeted.