SurveyUSA: Clinton Maintains Double-Digit Lead in Ohio

A new SurveyUSA poll in Ohio shows Sen. Hillary Clinton leading Sen. Barack Obama, 56% to 39%, in one of her "must-win" firewall states that votes on March 4.

Key finding: Clinton's lead comes entirely from women, where she leads by 29 points. Clinton and Obama are tied among men.

In the GOP race, Sen. John McCain leads Mike Huckabee, 50% to 36%.