The U.S. is starting down the path of a global trade war. It makes little sense to most economists, but economics might be the wrong lens through which to see the trade barriers U.S. President Donald Trump is building.

The argument that Saudi oil doesn't have a place in Canadian refineries makes little economic sense, but that's because it's not really about oil.

Regulators say the Keystone XL pipeline can be built through Nebraska, but they've ordered an alternate route, raising the possibility of further delays.