For the first time in years, Canada's Liberal Party has overtaken the Conservatives in federal election polling, marking a dramatic reversal just months before voters head to the polls—and U.S. President Donald Trump may be partly to blame.

Canada's ruling Liberals, who a few weeks ago looked certain to lose an election this year, are mounting a major comeback amid the threat of U.S. tariffs and are tied with their rival Conservatives, according to three new polls.

More than 36,000 people have signed a parliamentary petition urging Ottawa to bar U.S. President Donald Trump from Canada for persistently threatening the country’s sovereignty.

When asked if the federal election was held today, which party would you most likely vote for, the majority still said they would vote Conservative, but the gap is shrinking between the Liberals.

Before Canadian Prime Minister Justin Trudeau announced he would resign, his Liberal Party was headed for an electoral wipeout, but polls show the party gaining momentum, propelled by threats from Donald Trump. Surveys indicate Canadians believe Mark ...