Donald Trump continues to stand by controversial comments he made about Mexican immigrants as his standings in Republican primary polls improve despite increasing criticism. The presidential hopeful placed ahead of perceived front-runner Jeb Bush in a new aggregated 'poll of polls' with 13.6 per cent support compared to the former Florida governor's 13.3. The rise comes as public figures and businesses continue to admonish Trump because of the comments saying that those crossing the border from Mexico illegally were 'rapists'. Former Republican candidate Mitt Romney told CNN Saturday that the businessman 'made a severe error in saying what he did...