At a campaign event in Springfield, Illinois, Donald Trump suggested a boycott of coffee giant Starbucks over the design of its Christmas coffee cups. The all-red design has angered religious conservatives who see it as part of an effort to undermine the meaning of Christmas. 'Starbucks is taking merry Christmas off [their cups] no more merry Christmas,' Trump said. 'If I become president, we'll all be saying merry Christmas again,' the candidate said to applause. Trump told a raucous crowd, 'Maybe we should boycott Starbucks. I don't know.' The real estate mogul also attacked his main rival, Ben Carson. 'This is a strange election, isn't it?', he said. 'If you try and hit your mother over the head with a hammer, your poll numbers go up.' Carson has faced a barrage of questions in recent days over claims about his allegedly violent past.