OMAHA, Neb. (AP) — Canadian National has sweetened its offer to buy Kansas City Southern railroad. Its latest move aims to derailed rival Canadian Pacific’s bid for the railroad that handles traffic in the United States and Mexico. Kansas City Southern said Thursday that it determined Canadian National’s revised $33.6 billion offer was better than the $25 billion agreement it had with Canadian Pacific. Canadian National President and CEO JJ Ruest says the combined railroad will connect Canada with the United States and Mexico and take advantage of expected growth in trade between the three countries. Canadian Pacific reiterated Thursday that it doesn’t plan to increase its bid for Kansas City Southern. It says its combination is the most likely to be approved by regulators.