Sen. Dianne Feinstein , Dead at 90.<br />Feinstein's death was confirmed <br />by "two sources familiar with the matter" <br />on Sept. 29, according to NBC News.<br />She was the oldest and <br />longest-serving senator in office.<br />She was the oldest and <br />longest-serving senator in office.<br />Feinstein had made plans to retire when <br />her current term was over next year.<br />A temporary successor will be assigned to her Senate seat by California Gov. Gavin Newsom.<br />In 1978, Feinstein became the first <br />woman to be named president of <br />San Francisco's board of supervisors.<br />After then-Mayor George Moscone and Harvey Milk were assassinated later that year, she was made acting mayor, the first woman to hold the title.<br />After then-Mayor George Moscone and Harvey Milk were assassinated later that year, she was made acting mayor, the first woman to hold the title.<br />After losing a bid for the governor's office in 1990, Feinstein won a special election to become the state's first female senator.<br />During her time in the Senate, Feinstein wrote the 1994 assault weapons ban which was signed into law by then-President Bill Clinton.<br />During her time in the Senate, Feinstein wrote the 1994 assault weapons ban which was signed into law by then-President Bill Clinton.<br />The ban later expired during <br />the George W. Bush administration.<br />Feinstein also sponsored bills to protect California land, create a national AMBER alert network, reauthorize the Violence Against Women Act and more.<br />Feinstein also sponsored bills to protect California land, create a national AMBER alert network, reauthorize the Violence Against Women Act and more.<br />But toward the end of her career, Feinstein's ability to govern amid a seemingly declining mental state became a main topic of concern in the Senate.<br />But toward the end of her career, Feinstein's ability to govern amid a seemingly declining mental state became a main topic of concern in the Senate
