Sen. Dianne Feinstein, a trailblazer in American politics, passed away on Thursday at the age of 90, leaving an open seat in the United States Senate for California. Gov. Gavin Newsom has reaffirmed a pledge to appoint a Black woman to fill the vacancy, and hopes to make the decision soon. Feinstein was the first woman to serve as a U.S. Senator from California, and was a powerful advocate for women's rights, civil rights, and gun control.