![Too early to declare Donald Trump winner: former ambassador](https://shawglobalnews.files.wordpress.com/2016/03/alba219-35_2016_200033_high.jpg?quality=70&strip=all&w=650&h=433&crop=1)
Republican and former U.S. ambassador to Canada David Wilkins tells Tom Clark he is not convinced Donald Trump will be the Republican presidential nominee - and Mitt Romney's speech attacking Trump last week may be part of a party establishment upset ahead of its summer convention.