WASHINGTON - American officials have been quietly raising questions about whether Canada's marijuana legalization might slow traffic at the border, and are being told by their northern neighbours there's no reason that should happen.

The issue has come up in phone calls between high-level officials and again in passing this week during a first face-toface encounter between Public Safety Minister Ralph Goodale and his U.S. counterpart, Homeland Security Secretary Kirstjen Nielsen.

It hasn't been contentious, he said. "The only thing they say is, 'Will this cause lineups?'" Goodale said in an interview.

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