As the White House was gearing up to sell ObamaCare to the American people last summer, Valerie Jarrett, the president’s pointwoman on a host of issues, phoned Oprah Winfrey. She invited the Queen of All Media to join celebrities, including Amy Poehler, Jennifer Hudson and Alicia Keys, to meet with President Obama and discuss how they could generate publicity for his health-care law. Oprah refused. Obama had been counting on Oprah’s immense persuasive powers to help enroll millions in ObamaCare. But as the rollout turned into a disaster, Oprah didn’t lift a finger to help.