At age 88, the giant of California politics is the oldest sitting U.S. senator. Five members of Congress — including four Democrats — have told The Chronicle that they're concerned that her memory is rapidly deteriorating, and that it appears she can no longer represent the state without her staff doing much of the work. Reporters Tal Kopan and Joe Garofoli join host Demian Bulwa to discuss these concerns and the response from Feinstein and her allies. | Unlimited Chronicle access: sfchronicle.com/pod

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