Feinstein passed away Thursday night. She was 90 years old.
RELATED: Senator Dianne Feinstein, an 'icon for women in politics,' dies at 90
Dianne Feinstein, an 'icon for women in politics,' has died
Feinstein was San Francisco's first female mayor and California's first female senator, where she went on to serve six terms.
She gained a lot of support along the way, including from fellow former SF Mayor Willie Brown.
Watch the full interview in the player above as Brown reacts to the news of the political icon's death and commends her decades-long service.