FOR A long time now, Pranab Mukherjee has been the Congress-led UPA government’s Miracle Man. He is many parts rolled into one: the main troubleshooter, a great unifier and the man to get the most improbable job done. “The man for all seasons and all reasons,†they called him. But even miracle men are human and prone to errors. On Budget Day, he made a misstep whose effects are likely to be felt on our politics for a long time.