The Obamas have a busy weekend of movie watching lined up, according to sources. The White House has requested a print of the Margaret Thatcher biopic “The Iron Lady” for a screening. Star Meryl Streep is up for best actress at the Golden Globes on Sunday night. Meanwhile, Cuba Gooding Jr. — star of another historical film, “Red Tails” — told us at its premiere this week at the Ziegfeld that he’s expected at the White House tomorrow with co-stars including Terrence Howard for a screening there. Executive-produced by George Lucas, “Red Tails” follows a crew of African-American pilots in World War II.