Hello AH.commers, today your challenge is to make Toronto Mayor Rob Ford the Conservative Prime Minister of Canada. You may do this however you like, but strong changes to Ford's character and personality is frowned upon.
Not getting addicted to cocaine can't hurt.
Have him enter the House of Commons instead of entering the Toronto City Council. Harper fails to win the Premiership (or reelection), and Ford wins the Leadership as a Dark Horse candidate, and leads the PC to victory in the next election.