Trump and Trudeau upbeat about prospects for NAFTA deal by Friday

WASHINGTON (Reuters) - The leaders of the United States and Canada expressed optimism on Wednesday that they could reach new NAFTA deal by a Friday deadline as negotiators prepared to talk through the night, although Canada warned that a number of tricky issues remained.Under pressure, Canada rejoined the talks to modernize the 24-year-old North American Free Trade Agreement after Mexico and the United States announced a bilateral deal on Monday.Canadian Foreign Minister Chrystia Freeland said..