OTTAWA - The economy's impressive run has prompted another interest-rate hike from the Bank of Canada ? but looking ahead it warned of the broadening negative impact of NAFTA's uncertain future. The central Bank pointed to unexpectedly solid economic numbers as key drivers behind its decision Wednesday to hike the trend-setting rate to 1.25 per cent, up from one per cent. It was the bank's third increase since last summer, following hikes in July ...