sockagphoto/iStock Editorial via Getty Images Introduction Canadian National Railway (NYSE:CNI) (TSX:CNR:CA) has been a core holding of my portfolio for many years now. Canada’s largest railroad, with significant operations in the US, operates in an industry only set to grow. My previous article, published in August last year, covered some of these growth prospects with port expansions, commodity transportation growth, and pricing power. Since then, the shares have fallen 3.4%, and when including divide ...