Vice President-elect Kamala Harris, left, and California Gov. Gavin Newsom in 2018. Newsom will appointment a successor to Harris in the Senate, a highly-coveted seat among California Democrats.

Sen. Kamala Harris, left, endorses California Lt. Gov. Gavin Newsom for the 2018 California Governor’s race at the Ronald Tutor Campus Center at the University of Southern California in Los Angeles, Friday, Feb. 16, 2018. (AP Photo/Damian Dovarganes)