By Promit Mukherjee and Rod Nickel PORT MOODY, British Columbia (Reuters) -Donald Trump re-emerged as a factor in Canada's election campaign on Thursday, days before a vote that Prime Minister Mark Carney says will determine how Ottawa can best stand up to the U.

Mark Carney’s Liberal Party is holding on to a narrow lead in opinion surveys with less than a week to go before Canada’s election, as US tariff threats remain a top issue in the campaign. Among decided voters,