Robert Creamer Prison?

There was an interesting guest at President Obama's first state dinner on Nov. 24. Robert W. Creamer, a friend of White House adviser David Axelrod. A friend told me Robert Creamer was released from federal prison in 2006 after serving a five-month sentence for financial crimes.
What exactly did Robert Creamer do to spend time in prison? Why is Obama allowing an ex convict like Robert Creamer to be invited to the white house?

Robert Creamer also used to be the leader of an ACORN-tied left-wing group called Citizen Action Illinois. But, the FBI began investigating him for bank fraud and tax evasion and he stepped down.

In 2006, he was convicted and served a year and a half in federal prison and house arrest. While in prison, Creamer wrote a lengthy manual: "Listen to Your Mother: Stand Up Straight! How Progressives Can Win."

A convicted felon, who was invited to the White House for a state dinner — that alone is exceptionally rare.