And in Iowa, Democratic presidential candidates held their final debate of the year Thursday, just weeks before the first primary vote. Congress member Dennis Kucinich was excluded despite having the same polling numbers as three other candidates both nationally and locally in Iowa. Also excluded was former Alaska Senator Mike Gravel. In a campaign first, Gravel has released a rap video criticizing his exclusion. The song samples John Lennon and Yoko Ono’s “Give Peace a Chance.”