This is no surprise. To be honest, I anticipated this. Franklin Roosevelt threatened to do this to the Supreme Court when it appeared that they would strike down a goodly part of his unconstitutional "New Deal". Now we have the same thing going on, with more progressives being put in positions to be electors for the next pope. I needn't rehash what others have said. See here and here and here.
Pope Francis is not the first to stack the College of Cardinals. Probably the most recent attempt was by Pope John XXIII as he attempted to preserve the proceedings of Vatican II. This I learned from Taylor Marshall's book "Infiltration". By the way - I'd suggest that everyone get a copy of this book and read it now. It can be obtained on Amazon.
To understand a bit better about this latest crop of cardinals, please take a gander. This post from the heretic Fr James Martin speaks volumes.