OTTAWA—So, there you have it. The diabolical Conservative plot to smoke out Justin Trudeau, laid out in black-and-white and on the record, with NDP support. Except it is hardly a foolproof strategy and there is merit in the government’s move to shake up some hidebound election debate traditions in this country. Political debates are supposed to be like rainbows and cute kitten videos. We supposedly just can’t get enough. They are often the point at which voters engage.