Dianne Feinstein
Sen. Dianne Feinstein (D-CA).
  • Sen. Dianne Feinstein of California won't seek reelection in 2024.
  • The announcement comes as Democrats have already entered the race for Feinstein's seat.
  • Feinstein, 89, is the oldest senator and longest-serving senator of California. 

Sen. Dianne Feinstein announced on Tuesday that she will not seek reelection in 2024 but will finish her current term, following much speculation about her future plans amid growing concerns about her mental fitness and as some Democrats have already entered the race for her California seat.

"I am announcing today I will not run for reelection in 2024 but intend to accomplish as much for California as I can through the end of next year when my term ends," Feinstein said in a statement. "Even with a divided Congress, we can still pass bills that will improve lives."