Sixteen Democrats and four Republicans make up the Senate women's caucus. They span the ideological spectrum from San Francisco-area liberals Dianne Feinstein and Barbara Boxer to tea-party favorites Deb Fischer of Nebraska and Kelly Ayotte of New Hampshire. The age spectrum runs from Feinstein, 80, to Ayotte, 45. Mikulski, elected in 1986, is the longest-serving woman in Senate history. The most measurable aspect of the ever-increasing presence of women, and so far the most significant, is their impact on national policy—from making sure federal researchers included women in clinical trials, to the current show of force on sexual assaults in the military. Onetime "women's issues" such as health, education, child care, abortion, and pay equity are now prominent on the congressional docket.
In this week's National Journal cover story, Jill Lawrence discusses whether women make better senators than their male counterparts. In the video above, go behind the story with Jill Lawrence.