In other campaign news, Canadian Prime Minister Stephen Harper has launched an internal security investigation after a memo was leaked to the press discussing a meeting between an adviser to Barack Obama and Canadian officials. The leaked memo alleged that Obama’s senior economic adviser assured the Canadians that Obama’s public critique of NAFTA was more political positioning than a clear articulation of his policy plans. On Wednesday, Harper said the leak of the memo was blatantly unfair to Obama. The leak came days before the primary vote in Ohio. CBC and other Canadian news outlets report Harper’s own chief of staff, Ian Brodie, was the source of what is now being dubbed NAFTA-gate.