Joe Biden's underdog campaign is reportedly putting it all on Iowa, with his senior national staff being trasnfered almost entirely to the caucus state. His sister and lead surrogate, Valerie Biden Owens, will be spending 90% of her time between now and the caucus.

Biden currently has nine state legislative endorsements in Iowa, behind only Hillary Clinton and Barack Obama, but he has remained invisible in the polls there despite that support. Biden's hope is that his three-state plan for Iraq could catch on in a state with very strong anti-war sentiment, on the argument that it is the best chance for a safe pullout from the country.