"We were very clear that as long as the 232 tariffs were there it would be very, very hard for us to ratify the new NAFTA," Foreign Minister Chrystia Freeland said on Saturday.
Researchers want space-miners to focus on the Moon, Mars and iron-rich bodies tumbling through the asteroid belt and leave things such as Jupiter and Saturn alone.
The company said on Tuesday first-half headline earnings is expected to rise at least 160%, boosted by higher iron ore export prices and a weaker rand/US dollar exchange rate.