Supporters of U.S. President Obama, Reeves and Barger, make telephone calls to encourage Iowa Democrats to attend caucus night from phone bank for 2012 Obama re-election campaign in Cedar Rapids

Supporters of U.S. President Barack Obama, Jeni Reeves (L) and Linda Barger, make telephone calls to encourage Iowa Democrats to attend caucus night from a phone bank for the 2012 Obama re-election campaign in Cedar Rapids, Iowa January 2, 2012. REUTERS/Jeff Haynes (UNITED STATES - Tags: POLITICS)