"What's happening is people who are feeling that the economy has passed them by - they feel threatened by things like trade and immigration - feel motivated to vote for a candidate with the same kind of anger,'' McLean said in an interview. "The surveys show that there's a grouping of voters who are motivated by this anger and are going to vote out traditional, conventional kind of politicians - and this is what Trump has benefitted from and has been able to feed off their energy.''