CN Rail seems set to become the most influential railway in North America with the decision Friday by the Kansas City Southern Railroad to terminate a tentative takeover deal with Canadian Pacific. As reported in April, CN disrupted the pending CP-KCS deal by offering a whopping $325 US a share for the midwest and Mississipi Valley line. When consolidated into the CN network, the KCS tracks will give CN a transcontinental network stretching from the Yukon to Mexico.