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By Brian Latimer

Former Mexico President Vicente Fox has never been shy about hiding his true opinions about Republican Presidential candidate Donald Trump and his campaign promise to build a border wall.

On Wednesday on MSNBC's Morning Joe, Fox again, called the proposed border wall a "stupid idea" and said his country would never pay for its construction.

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"I mean, it's a crazy, wild, stupid idea," Fox said. "We've been building such a strong partnership between Mexico and the United States. We exchange so much in trade, close to a trillion U.S. dollars....1 million people go back and forth at that border. Many, many Americans come into Mexico. Many, many Mexicans come in to invest, to trade with the United States."

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Fox said more Mexicans are in fact leaving the U.S. and returning to Mexico than Mexicans migrating north. A report by Pew Research Center found that 140,000 more Mexicans returned to Mexico than came into the U.S. between 2009 to 2014.

RELATED: Former Mexican President: We're Not Paying for a 'Stupid' Wall

"Look at the proposals of a false prophet," Fox told hosts Mika Brzezinski and Joe Scarborough. "I don't know what he has against Mexico, but we Mexicans love and like the United States. We'd like to keep this strong partnership that we have."

After Donald Trump's visit to Mexico and joint press conference with Pres. Enrique Peña Nieto, Fox tweeted at Trump and the two traded jabs online.

In early February, former Mexico President Felipe Calderon called the proposed border wall a "stupid idea" and said Mexico would not pay "a single cent" for its construction.

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