Helen Clark is an agile woman. When the chairs in her hotel room were not enough, she took a rattan chair from her bedroom, faster than her adjutant waiting at the corner of the room, or dozens of officers along the corridor of the 14th floor of the Hilton Hotel's Garden Tower, ready to serve the New Zealand prime minister. "Well, what do you want to ask?" enquired the statuesque 52-year-old in a friendly tone.

This professor in pol