Dianne Feinstein, the California senator who served for more than three decades and was a trailblazer for women in US politics, has died aged 90.
Feinstein was the oldest member of the US Senate and voted as recently as Thursday.
For months, the California Democrat had faced questions about alleged memory and cognitive issues.
In April, she was admitted to hospital after a "minor fall" at her home, the latest in a series of health concerns.
The former San Francisco mayor had previously announced plans to retire at the end of next year, but resisted growing calls for her to step down.