By Emily Green, David Ljunggren and Stephen Eisenhammer MEXICO CITY (Reuters) -Prime Minister Mark Carney is scrambling to save his country's relationship with Mexico after it disintegrated late last year when Canadian officials suggested they'd be better off negotiating a trade deal with the Trump administration alone.

Mexico’s president hosted senior Canadian ministers for talks after both countries were hit with new tariff threats last week.

The imbalance in President Trump’s treatment of America’s closest trading partners may come from his desire to make Canada the 51st state, some Canadians believe.