Love him or hate him, public affairs guru Mark Penn has the ear of some of the most powerful people in the world, having worked with luminaries such as Bill Clinton, his wife Hillary, and former British Prime Minister Tony Blair.
  
In terms of Washington power brokers, Burson-Marsteller's Penn stands right at the top of the food chain. His challenge is to remain relevant and influential in a rapidly changing global political climate, and to lead his ...