New York Times: In a surprise announcement, Mayor Michael R. Bloomberg said Thursday that Hurricane Sandy had reshaped his thinking about the presidential campaign and that as a result, he was endorsing President Obama. Mr. Bloomberg, a political independent in his third term leading New York City, has been sharply critical of Mr. Obama, a Democrat, and Mitt Romney, the president’s Republican rival, saying that both men had failed to candidly confront the problems afflicting the nation. But he said he had decided…