Johansson, Eva Longoria and Kerry Washington star in an ad that criticises the Republican challenger's stance on women's health issues, and condemns the Republican Party for pushing legislation to "redefine" rape and force women in the early stages of pregnancy to undergo invasive ultrasounds.
The 30-second ad made by MoveOn.org, the liberal advocacy group, illustrates how alarmed the president's supporters are by the amount of support he has lost among women voters since his weak performance in the first debate with Romney on Oct 3.