Former Mexican President Vicente Fox is hitting Donald TrumpDonald John TrumpDemocrats slide in battle for Senate Trump believes Kushner relationship with Saudi crown prince a liability: report Christine Blasey Ford to be honored by Palo Alto City Council MORE yet again — but this time it’s a lot more literal.

Fox was a guest last week on the Los Angeles-based Spanish-language talk show “El Show de Piolín,” where he visited a taco truck to mock a Trump surrogate’s warning that not voting for Trump would mean a “taco truck on every corner.”

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"Los tacos will make America great — not the other guy,” Fox told the show’s audience, before turning around and cracking open a Trump-shaped piñata, revealing it to be empty inside.

"Empty, totally empty,” Fox said in reaction. "He doesn't have a brain.”

Mexico's ex-head of state has been an outspoken critic of Trump’s immigration policies and, in particular, the GOP presidential nominee’s vow to build a wall along the southern border and make Mexico pay for it.

Fox has insisted that his country would not pay for “that f--king wall” and has compared Trump to Nazi leader Adolf Hitler.

On Trump’s recent trip to meet with Mexico’s current president, Enrique Peña Nieto, Fox said he expected the entire country to reject him.

“We don’t like him; we don’t want him; we reject his visit,” Fox said.

At a speech before the National Hispanic Foundation for the Arts on Tuesday night, Fox continued his campaign against Trump, calling him "a false prophet" who is "going to lead this nation to the desert."

— Rafael Bernal contributed to this report.