Not only has Hillary lost her lead in Iowa, but she is way down in New Hampshire too. In October, she averaged (5 polls) a 19 pt lead over Obama. In early and mid November, her lead dropped to an average (5 polls) of 13 pts. In the polls at the end of November, her lead is down to an average (4 polls) of 9 points with the two most recent surveys — Rasmussen and Fox News — showing her lead at 7 pts.
Given the sharpness of her drop, it is likely that a loss in Iowa would cost her New Hampshire as well.