Fox told Fusion's Jorge Ramos that Trump should pay for the U.S.-Mexico border wall, the Republican's marquee foreign policy plan, because "he's got the money."
"Democracy cannot take us to crazy people," Fox responded when asked if he was afraid that Trump would win the election.
Fox also cited Trump's decisive win at the Nevada caucuses, particularly his support from Hispanic voters, as evidence of a troubling precedent.
"I would like to know who those Hispanics are because they, again, they are followers of a false prophet, and he's going to take them to the desert," he said. "If they think they will benefit from an administration led by Donald Trump, they're wrong."
Fox also said Trump is not a Republican. "Open your eyes," he said.
"It's not to defend our race, it's not to defend our creed. It's to defend this very same nation that is hosting you. This nation is going to fail if it goes into the hand of the crazy guy," Fox said.
Current Mexico President Enrique Peña Nieto has also said that our southern neighbors would not be paying for a border wall.
Fox's remarks were first flagged by Independent Journal.
Watch the interview, via Jorge Ramos: