The ruthless, aspiring class president Reese Witherspoon played in 1999’s Election could be a descendant of Becky Sharp, the conniving centerpiece of Vanity Fair, William Makepeace Thackeray’s 1848 expose of Victorian high society. Which gives Witherspoon another chance to exhibit the mischievous edge that juts out now and then like her javelin of a chin. Director Mira Nair adds a unique visual opulence that’s at once gorgeous and jaded.