Tagg Romney isn't happy with the portrayal of his grandfather, former Michigan Gov. George Romney (R), on "Mad Men."

"Seriously, lib media mocking my dead grandpa?" Tagg Romney, Mitt Romney's son, wrote Monday on Twitter, responding to a line quoted from the show. "George Romney was as good a man I've ever known," Tagg wrote. "Inspirational leader, worked for civil rights, promoted freedom. We need more like him."

Sunday night's episode of "Mad Men" had Henry Francis, a staffer to the New York governor, saying he wouldn't let his boss go to Michigan because, "Romney is a clown and I don't want him standing next to him."

George Romney was Michigan's governor from 1963 to 1969.

Watch the clip: