Reflections: Michael Portillo

James Naughtie talks to former Conservative Cabinet Minister Michael Portillo about his zigzag career in politics. From his early days working for Margaret Thatcher, to his time as Defence Secretary, dramatic loss in what is still called the 'Portillo moment', and bid for the Conservative Party leadership, Portillo reflects candidly on his strengths and weaknesses, and what kind of a leader he might have made