Barak Obama is a (136)

'The most charitable explanation is that he and his advisers have succumbed to a view of electoral success to which many Democrats succumb — that “centrist” voters like “centrist” politicians. Centrist voters prefer honest politicians who help them solve their problems. A second possibility is that he is simply not up to the task by virtue of his lack of experience and a character defect that might not have been so debilitating at some other time in history. Those of us who were bewitched by his eloquence on the campaign trail chose to ignore some disquieting aspects of his biography: that he had accomplished very little before he ran for president, having never run a business or a state; that he had a singularly unremarkable career as a law professor, publishing nothing in 12 years at the University of Chicago other than an autobiography; and that, before joining the United States Senate, he had voted "present" (instead of "yea" or "nay") 130 times, sometimes dodging difficult issues.

A somewhat less charitable explanation is that we are a nation that is being held hostage not just by an extremist Republican Party but also by a president who either does not know what he believes or is willing to take whatever position he thinks will lead to his re-election'.
What Happened to Obama?
By DREW WESTEN
Published: August 6, 2011 New York Times

That is a good article by a professor of psychology.