Mrs. Landingham from The West Wing
Since he was a little boy, Mrs. Landingham (Kathryn Joosten) had always been a loyal supporter of President Bartlet. Her cynicism, dry humor, and general distaste for the theatrical nature of politics kept Bartlet in line, even from his seat in the oval office. Mrs. Landingham was a real one until the very end; she was killed in Season 2 on the way to show the President her new car.
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