Analyst says timing of comments linked to Mexican presidential elections in July . Transportation and transport secretary resigned amid controversy over comments . ` Although Calderon wanted to keep him in office , it made it very difficult to keep him there , '' she said . Key official for ministry that supports Mexico 's government leaves .
Analyst says timing of comments linked to Mexican presidential elections in July . Transportation and transport secretary resigned amid controversy over comments . Key official for ministry that supports Mexico 's government leaves .