By Selwyn Duke

Donald Trump’s claim that he could build a southern-border wall and have Mexico pay for it was certainly good GOP primary rhetoric. But now a former Mexican official says it’s also something the Republican nominee’s critics never suspected: a realistic policy proposal.

Jorge Castañeda, who was Mexico's secretary of foreign affairs from 2000 to 2003 and is now a New York University professor, made his comments at the Hudson Institute (video below) in Washington last Wednesday.

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