The effects of the Buy American campaign

This comes from an article in the Economist magazine:

Canadians are already worried at signs of rising protectionism in their neighbour’s Democrat-led Congress, in the form of Buy American provisions in the economic-stimulus package and proposals in a new environmental bill to impose trade sanctions on countries with high levels of greenhouse-gas emissions. Their indignation has been heightened by two unfortunate incidents. A contractor at the Camp Pendleton Marine base in California ripped out a section of sewerage pipe because it was Canadian-made; and a Canadian salesman travelling to an equestrian-products trade show was turned back at the Washington state border on the ground that he was “stealing” American jobs.