In an interview published by a Mexican newspaper, President Enrique Pena Nieto compared Trump's "strident expressions that seek to propose very simple solutions" to big problems to the rhetoric of the world's most notorious dictators.
"That's the way Mussolini arrived and the way Hitler arrived," Pena Nieto said.
Mexican Foreign Affairs Secretary Claudia Ruiz Massieu last week ripped Trump as "ignorant and racist," and called the border wall idea "absurd."
"It is impossible to think of a 2,000-mile border being walled off and trade between our two countries stopped," she said, adding that it would be "impractical, inefficient, wrong and, frankly, it is not an intelligent thing to do."