Chicago, Illinois (CNN) - Lawyers for Rod Blagojevich filed a motion Thursday seeking to subpoena President Barack Obama to testify in the corruption case against the former Illinois governor.
The 10-page motion contends Obama must have information in the case because the charges against Blagojevich involve alleged deal-making to fill the U.S. Senate seat vacated by Obama when he became president.
"The defense understands that the President of the United States of America is not a routine witness and would not request his appearance if it did not think he was critical to the liberty of Rod Blagojevich," the motion says.
According to the motion, Obama's public assertion that he had no involvement in talks about filling his Senate seat contradicts information from another witness in the case.
In addition, the motion says Tony Rezko, a political fundraiser convicted of fraud charges who has links to Obama, also is a government witness in the case and Obama can offer testimony about him.