Rufus Dawes is a Pen Name. It's taken from the name of a Union Officer from the Civil War, the first guy in command of Union Troops at Gettysburg. Both Carl and the Chiefs main PR guy at the time Bob Moore were both big civil war buffs. So they picked that name for their "pen name."
Wiki on "Rufus Dawes": http://en.wikipedia.org/wiki/Rufus_Dawes