The prime minister addressed Mexico's Senate Friday.
Carlos Barria / Reuters
Mexican officials have threatened to walk away from talks.
They'll talk trade as NAFTA negotiations continue.
Paul Chiasson/The Canadian Press
"I don't know who could be a friend of Pena Nieto."
Envoy Francisco Suarez said that under the Harper Conservatives, Canada lagged behind Mexico and the U.S. on environmental policy.