And why it matters to political behaviour
As you are citing published works, why do you talk about secrets?
This is straight up wrong. President Trump derailed lots of regulations put in place by Democratic party politicians. President Clinton put the U.S. gov't into the black on annual spending; President Bush immediately reversed course and put the U.S. gov't back into the red. There are many many other examples of opposing parties implementing opposing policies. You are entitled to your own opinion but not your own facts.