Now they fear Donald Trump.
The Mexican government is now actively working to stop his election.
Mexico's government on Tuesday unexpectedly changed two of its top officials responsible for U.S. relations, citing concerns about an increasingly anti-Mexican climate across the border.
Carlos Sada, previously the consul in Los Angeles, was named ambassador to the United States while Paulo Carreno, one of President Enrique Pena Nieto's communications chiefs, was appointed the deputy foreign minister for North America.
The new ambassador must still be approved by the Senate.
"We have been warning that our citizens have begun to feel a more hostile climate," Foreign Minister Claudia Ruiz Massieu told local radio after the announcement.
"This (anti-Mexican) rhetoric has made it clear that we have to act in a different way so that this tendency being generated doesn't damage the bilateral relationship," she added.
Mexican government officials have expressed concern about the rise of Republican presidential front-runner Donald Trump due to his repeated verbal attacks on Mexico, and his insistence that Mexico should be made to pay for a border wall.So the Never Trump movement grows and becomes international. I am sure this will mean increased revenues for those pushing Never Trump nonsense. They have that right, and if they wish to destroy the Republican Party just to hang on to power and donor money, I cannot stop them. I have been lectured on Twitter on how I cannot be a conservative and support Trump. I am fine with that. I added it to the tags I already have: racist, sexist, xenophobic, Islamophobic and hypocrite.
But I am an American and my candidate is opposed by a government that is sending its citizens to invade our nation and bankrupt us through our welfare system. Mexico has the strictest anti-immigrant laws on the continent. Its government is corrupt and has been for two centuries. I take President Enrique Pena Nieto's opposition as a sign that Trump is doing something right.