If there were any doubt that an NDP government would bring a different approach to energy policy than what we've seen under Prime Minister Stephen Harper's Conservative government, those doubts were laid to rest on Tuesday in a speech Thomas Mulcair gave to the Economic Club of Canada.  The speech included no fewer than seven significant policy positions, not all of them new.  These positions are a combination of Mr. Mulcair's historic strengths and some red meat for the NDP base.  There's…