election campaign, a new poll suggests.The Ipsos poll conducted exclusively for Global News found Singh was the only party leader who was viewed more positively than negatively, with 45 per cent approval versus 39 per cent disapproval among those surveyed.Trudeau, by contrast, had the highest unfavourability rating of any leader at 53 per cent, while 41 per cent said they viewed him favourably.“(Singh) represents the most serious challenge to Justin Trudeau and his leadership,” said Darrell Bricker, CEO of Ipsos Public Affairs.“Those (progressive) voters, which is the largest group of voters that we have in the Canadian electorate, they’re now dividing their loyalties between the two of them.