Pres. Obama avoids categorical denial about IRS scandal; so what does he know?

Pres. Obama avoids categorical denial about IRS scandal; so what does he know?
President Barack Obama pauses as he speaks at Ohio State University's spring commencement in the Ohio Stadium, Sunday, May 5, 2013, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

John Carlson seizes on a subtle, yet critical moment in Pres. Obama’s latest press conference. Pres. Obama avoids answering the first reporter’s question about his knowledge of the IRS.