Residents of the United States are far more concerned about the prospect of allowing non-essential land travel to resume across the U.S.-Mexico border than they are about letting Canadians drive south for the winter, a new poll suggests. The online poll, conducted last month by Leger for the University of Manitoba and Metropolis North America, found just 29 per cent of the 3, 714 U.S. respondents were very or somewhat worried about the resumption of incidental travel across the Canada-U.S. land