Belinda Stronach has slid while former boyfriend Peter MacKay has soared. Their failures and successes speak to the shifts in political mood.There was a moment in May 2005 when it appeared as though Belinda Stronach had managed, with a little help from her friends, to catapult herself over the entire Canadian political landscape, coming down, to considerable fanfare, among the top decision-makers in government. Without a shred of real political experience, without ever having held a job she was not appointed to by her father, without even a university degree, Stronach had claimed credit for uniting the right, placed second...