OTTAWA, Ontario — President Barack Obama and the leaders of Mexico and Canada pushed back forcefully on Wednesday against the isolationist and anti-immigrant sentiments that have roiled Britain and been championed by GOP presidential candidate Donald Trump. The leaders warned against easy solutions peddled by “demagogues” who feed on economic anxiety.

With tensions growing over terrorism and fallout from Britain’s exit from the European Union, Obama acknowledged that Americans and others have reason to be concerned about their own future in a rapidly globalizing economy. He said concerns about immigrants had been exploited by politicians in the past, but he insisted he wasn’t worried Americans will follow that path.

“We should take some of this seriously and answer it boldly and clearly,” Obama said, without naming the Republican presidential candidate. “But you shouldn’t think that is representative of how the American people think.”

Gathering in the Canadian capital, the leaders argued that instead of withdrawing from the world, advanced countries should focus on higher standards, wages and legal protections that would ensure the benefits of globalization are widely felt.

Obama spoke at a joint news conference with Canadian Prime Minister Justin Trudeau and Mexican President Enrique Pena Nieto.