(Reuters) - Canada's main stock index looked set to edge higher on Friday after hitting a near three-week low the previous session, helped by hopes the U.S. government will eventually break a budget impasse even as a partial shutdown entered its fourth day. TOP STORIES * The shutdown of the U.S. government appeared likely to drag on for another week and possibly longer as lawmakers consumed day three of the shutdown with a stalling game and there was no end in sight until the next crisis hits Washington around October 17. * A prolonged U.S. ...



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