What actress is strong enough to play Alicia’s mom on “The Good Wife”? How about a former First Lady? Stockard Channing has been cast in the CBS drama as the mother of Julianna Margulies’ character. Channing will appear in at least one episode during the upcoming fourth season. Alicia’s mother is described as mercurial and influenced by her 1960s counterculture youth: perfect for Miss Stockard, who had her fun at Radcliffe in the heady 1960s. Best known for her role as First Lady Abbey Bartlet on NBC’s “The West Wing,” Channing has appeared in numerous films and TV shows, such as the original 1978 “Grease” (Rizzo!) and her own “Stockard Channing Show” in 1980.