Dianne Feinstein
Feinstein, a Democrat, has been a Senator representing California since 1992, and is still shattering glass ceilings today. Back when she joined the Senate, Feinstein was the first woman to serve on the Senate Judiciary Committee. In January 2017, Feinstein will become the first woman to serve as the highest ranked Democrat on the Judiciary Committee, which means she'll play a crucial role in weighing Supreme Court nominations, along with attorney general and other court nominations, the Los Angeles Times reports. "It's a special honor to be the first woman to become ranking member of this committee, not to mention the first Californian," Feinstein said in a statement. "This committee, which touches the lives of so many Americans, will face many tough issues in the coming years, and I'll do my level best to represent all Americans."