Jeb Bush, the former Florida governor and brother of the ex-president, has warned Mitt Romney that he has boxed himself in politically with rhetoric over illegal immigration and said Republicans need a change of tone on the issue if they are to win over Latino voters. Bush said that immigration was among issues that have seen Republicans become so partisan that even Ronald Reagan would face trouble winning the party's presidential nomination today because he co-operated with Democrats. The former governor, who has been touted as a possible running mate for Romney but who says he does not want the...