Several recent polls show Obama leading Hillary Clinton by a double-digit margin less than a week after the one-time front runner came in a disappointing third in the Iowa caucuses.

• 近期一些民调显示，继昔日领先者希拉里在爱荷华州党内预选屈居第三后的短短几天，奥巴马以双位数的支持率领先希拉里。