At the risk of sounding cliche, its worse than that!
After all the controversy surrounding Donna Braziles book Hacks, I was sorely tempted to purchase it, but just reading the preface convinced me the kind of delusion you describe is systemic amongst liberals. They seem to have the unfortunate ability to truly forget their excuses, distortions, and outright lies are so much bullshit devised by themselves for the purpose of saving face, avoiding legal consequences, and/or justifying unjustifiable actions.
In short, they are quintessential practitioners of Orwells proverbial DoubleThink.
Somebody got to her.