* FILE ** President Barack Obama pauses as he speaks at Northern Michigan University, Thursday, Feb. 10, 2011, in Marquette, Mich. (AP Photo/Carolyn Kaster

Photo by: Carolyn Kaster

* FILE ** President Barack Obama pauses as he speaks at Northern Michigan University, Thursday, Feb. 10, 2011, in Marquette, Mich. (AP Photo/Carolyn Kaster