Progressive Katie Porter launches bid for Dianne Feinstein’s US Senate seat

Democratic congresswoman announces candidacy for seat held by Feinstein, 89, who has not yet said if she will retire

Democratic representative Katie Porter, the progressive former law professor known for her sharp questioning of witnesses and her use of a whiteboard during hearings, said she will seek the California Senate seat currently held by Dianne Feinstein.

Feinstein, a fellow Democrat, is the oldest member of the chamber, and has not yet said if she will retire.