In the 1992 Presidential Debate between George H.W. Bush, Bill Clinton, and independent candidate Ross Perot, Perot said that if the North American Free Trade Agreement was passed, people would hear a "giant sucking sound" as huge numbers of jobs in the USA would be lost to firms leaving this country and locating in Mexico to hire lower-cost Mexican workers. The prediction was that if NAFTA passed, the unemployment rate in the USA would skyrocket.

Indeed, many firms in the USA closed and opened operations in Mexico, but the overall unemployment rate in the USA actually fell drastically. Why do you believe that happened?