With her Camelot pedigree and Park Avenue address, Caroline Kennedy is not exactly the average American woman. But many women identify with her impulse to enter the work force after two decades of child rearing. Kennedy's bid for the Senate has reignited the "mommy wars" between mothers with careers and those who take a break from paid employment. Like Kennedy, many women face resentment when they return to the work force after raising kids and doing volunteer work. "She's a Kennedy, but she's a lot like us," was the headline of a Dec. 28 column by Anne Glusker in The...