Adam Schiff (D-CA), Barbara Lee (D-CA), and Katie Porter (D-CA) have announced runs for the seat.

Source: https://gazette.com/news/us-world/whos-in-whos-out-and-whos-still-waiting-to-announce-for-senate-in-2024/article_0c8d381b-8f4d-5e0f-be74-9486cf404e1b.html

Congresswoman Barbara Lee sponsored HR 8855 on September 15, 2022 to establish a program to address sickle cell disease and other heritable hemoglobinopathies.

Source: https://sacobserver.com/2023/06/black-lawmakers-continue-to-push-for-sickle-cell-action/

The decision followed mounting pressure from the Congressional Black caucus that's been voicing support for Rep. Barbara Lee, one of three candidates vying for the democratic nomination alongside Rep. Adam Schiff and Rep. Katie Porter.

Source: https://abc7news.com/laphonza-butler-california-senate-dianne-feinstein-lgbtq/13856755/

There is already a very intense race for Feinstein’s seat pitting veteran political leaders Congresswoman Barbara Lee, Congresswoman Katie Porter and Congressman Adam Schiff for a term that will begin in January 2025.

Source: https://lasentinel.net/sentinel-exclusive-u-s-senator-laphonza-butler-a-new-era-begins-in-california.html

The selection also made good on Newsom’s promise to appoint a Black woman while also defying calls to pick Rep. Barbara Lee, an existing candidate for the seat for which Feinstein had already decided against seeking reelection.

Source: https://newsone.com/4741651/ayanna-pressley-barbara-lee-laphonza-butler/