Iowa Governor Tom Vilsack says he will not publicly back a candidate in the Democratic Presidential race. Vilsack says the “first in the nation” status of Iowa’s Caucuses places a unique responsibility on the state’s governor to make sure all the candidates have an equal opportunity to make their case to Iowa voters.Vilsack says the second reason he’s not endorsing anybody is because the race this time around has been tight and in some cases bitter, and somebody’s got to be around — once the Caucuses are over — to bring democrats back together. Vilsack says democrats must be a unified party in order to accomplish anything come November. Vilsack says he wouldn’t be able to be that “unifying force” in his party if he were to be actively backing one of the presidential candidates.