Sen. Hillary Clinton at 44 percent leads Democratic presidential candidates . Sen. Barack Obama second at 24 percent , and McCain at 16 percent . Among Democrats who did not graduate from college , she leads Obama by 26 points , but among Democrats with a college degree , Clinton has only a three-point edge . Clinton only has a 3-point lead over Obama among college graduates .
Sen. Hillary Clinton at 44 percent leads Democratic presidential candidates . Sen. Barack Obama second at 24 percent , and McCain at 16 percent . Clinton only has a 3-point lead over Obama among college graduates .