Victor Davis Hanson‘s latest column for National Review Online dissects President Obama’s penchant for self-contradiction.

A sign of an undisciplined mind is serial lapses into self-contradiction, or blurting out a thought only to refute it entirely on a later occasion. For a president to do that is to erode public confidence and eventually render all his public statements irrelevant. That is now unfortunately the case with Barack Obama, who has established a muddled record of confused and contradictory declarations.

Last week, the president invoked executive privilege to prevent the release of administration documents related to the Fast and Furious operation. All presidents on occasion use that tactic, but rarely after they have put themselves on record, as did Senator Obama just five years ago, damning the practice as a de facto admission of wrongdoing. Does President Obama remember his earlier denunciation — or why he thought a special prosecutor was necessary to look into the Scooter Libby case, but not the far greater mess surrounding Eric Holder?

About the same time, President Obama offered de facto amnesty for an estimated 800,000 to 1 million illegal aliens. Aside from his circumvention of Congress and his casual attitude toward his own constitutional duty to enforce the laws as they are written, Obama had on two earlier occasions stated that he not only would not grant such blanket exemptions from the law, but also legally could not. That was then, this is now — the middle of a reelection campaign?