Senator Dianne Feinstein, the trailblazing Democratic power broker who served in the Senate for 30 years, died on Thursday night, according to a family member.
In recent years, Ms. Feinstein, 90, had suffered from frail health and memory issues that made it difficult for her to function alone and prompted calls for her to step down, which she consistently rejected.
Her condition had grown more acute over the past several months, after a bout with shingles that caused serious complications, including a case of encephalitis, and prompted her to begin using a wheelchair in the halls of the Capitol.
Ms. Feinstein’s long and very public decline shone a spotlight on the advanced age of members of Congress and particularly the Senate, where many continue to serve long after retirement age.
Her staff was being officially informed of her death at 9 a.m.
A spokesman for her Senate office did not immediately respond to a request for comment.
This is a developing story. Please check back for updates.