Robert Alexander McCallister is a fictional character on the ABC television series Brothers & Sisters.

Robert McCallister first met Katherine 'Kitty' Walker (Calista Flockhart) when she interviewed him on her talk show.

Recently divorced, his marriage to Courtney (Marin Hinkle), with whom he had two young children, was marred by a scandal regarding allegations of his infidelity.

When Kitty's talk show folded, Robert asked her to become the communications director for his senatorial office, and later, presidential campaign.

Robert announces his candidacy for governor of California shortly before suffering a heart attack on the way to see his new adopted baby at the hospital.

Robert steps down as senator and his soon to be vacant seat is vied for by his wife Kitty, who during the first half of the season battles (and enters remission for) stage 3 lymphoma.

The entire family is doubtful of his recovery chances and Justin finally tells Kitty that Robert wouldn't want this, using his last words to help Holly as proof.