There's an interesting discussion in Canadian politics on whether the oil, natural gas and lumber resources flowing out of Western Canada are bad for Canadian industry. "Dutch disease" is the buzz word; the idea is that increased exports of commodities drives up the Loonie, thus making it harder to export other Canadian goods.
Since the manufacturing sector is more unionized than the timber and energy industry and the commodities tend to flow out of the conservative parts of Canada, the labor-centric NDP is not happy. New NDP boss Thomas Mulcair has gotten into a tweet-war with Saskatchewan premier Brad Wall, who heads up a right-of-center Saskatchewan Party that goes toe-to-toe with the NDP in provincial politics.
There is some interesting economics here; the NDP is essentially trying to put up trade barriers for their own citizens to sell abroad. We're used to seeing trade barriers used to protect domestic industry, but using export barriers to protect favored industries from less-favored ones is somewhat novel.
It wouldn't be the first time; Argentina has seen their Peronist leader slap export quotas on agriculture in order to keep domestic food prices down.