President Barack Obama and the woman who likely wants to be his successor, former Secretary of State Hillary Clinton, held a secret meeting at the White House on Thursday. In a strange sequence of events, the White House was forced to confirm the previously undisclosed Obama-Clinton lunch summit after People magazine tweeted — then mysteriously deleted — the news about the meeting. “The President enjoyed an informal, private lunch with Secretary Clinton at the White House this afternoon,” a White House official said. Because the lunch had not been on the president’s public schedule, Roll Call reporter Steve T. Dennis,...