Krugman summarized Ron Suskind's book on Paul O'Neill, "The Price of Loyalty". Among all:

The money quote may be Dick Cheney's blithe declaration that "Reagan proved deficits don't matter." ... Mr. O'Neill and Alan Greenspan knew that it was a mistake to lock in huge tax cuts based on questionable projections of future surpluses....
Mr. Bush, who declared in the 2000 campaign that "the vast majority of my tax cuts go to the bottom end of the spectrum," knew that this wasn't true... Donald Rumsfeld pushed the idea of regime change in Iraq as a way to transform the Middle East at a National Security Council meeting in February 2001....
There's much more in Mr. Suskind's book. All of it will dismay those who still want to believe that our leaders are wise and good.