Here is the link to an article by John Geddes "Building a consensus on climate change? Not so easy, after all", Ottawa bureau chief at Maclean’s, who does a good job of distilling my point that while carbon pricing is the most economically efficient GHG reduction policy, it is willful blindness to assume that economic efficiency is the only criterion when trying to implement climate policy. If regulations are more politically acceptable, especially for doing the heavy lifting, then put some intelligence (even economic intelligence) into designing market-oriented regulations that are relatively economically efficient.
One might notice by the way, that in the first two weeks of March Trudeau failed to get provinces to agree to even a small carbon price (that would have virtually no effect on emissions - such as $15 or $30 per tonne of CO2)) and then went to Washington and quickly signed an agreement with Obama to dramatically reduce methane emissions from the oil and gas industry. No mention of emissions pricing. It will be regulation."