There is a loophole Nick!
The question is weather any Democrats have the nuts to do it. The constitution does not specify the number of Supreme Court justices that make up the court. The Republicans HAVE NOT HESITATED to run rough shod over anyone who disagrees with them. Even when the Democrats controlled most of all 3 branches of government, for the most part, they did not rubber stamp every liberal idea. The next time the Democrats control all branches, the president should appoint 9 extra Ultra-Liberal judges to the court! Republicans see this as a weakness that we don’t do to them what they do to us…time to change that.
He/She should then propose a constitutional amendment that specifies 9 justices to the court with the majority party and a coalition of the minority party/parties alternately selecting a nominee which the president then submits to congress, thus persevering the system of checks and balances.