U.S. President Barack Obama has selected a partner at the investment firm of Goldman Sachs in Chicago to be the new U.S. ambassador to Canada, CBC News has learned. Sources tell CBC News Network's Power & Politics that Bruce Heyman has accepted the job but still has to pass a vetting process in order to be be formally nominated. His confirmation will be up to the U.S. Congress. If he is approved, Heyman would replace David Jacobson, who has held the position since 2009. Jacobson is also from Chicago. Well known as a high-level fundraiser to Barack Obama, Heyman and...