InsideClimate: By asking John Podesta to come to the White House as a special counselor at a time of turmoil and tough choices, President Obama has created an unusually close tie to an outspoken critic of the Keystone XL pipeline and the Canadian tar sands it would carry. Podesta is a Washington policy insider who was Bill Clinton`s chief of staff and whose Center for American Progress, or CAP, is an influential voice of liberalism. He has kept climate change high on his agenda for years and will continue to do...