'Buy American' clause concerns Harper

OTTAWA - Prime Minister Stephen Harper expressed "serious concern" on Thursday over a provision of the U.S. stimulus bill that would require infrastructure projects to use American steel, putting Canada on the edge of its first trade dispute with the United States since Barack Obama was inaugurated.

The "Buy American" clause would ban the use of most foreign iron and steel from infrastructure projects funded under the US$819-billion stimulus bill, which passed the U.S. House...

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