That's a beautiful counter. You know he won't be able to come up with CURRENT examples. Of course, that's because we have tons of laws protecting consumers from predatory monopolies.
Predatory monopolies like cable companies that are granted monopoly status by law, or utilities that are granted monopoly status by law? Or the United States Postal Service, which has monopoly status by law? Does anyone else see a pattern here?
Can you name a single monopoly that did not get to be a monopoly without government help?
Cable companies aren't granted monopoly status by law. They were granted temporary monopolies because the alternative is that no one would have laid the fiber, but that's not really an issue now. The USPS doesn't have a monopoly on delivery (see FedEx and UPS). They do have a government-granted monopoly on certain types of deliveries, but that's a element of our constitutional commitment to have national mail delivery (get rid of USPS, and large portions of the country would be without mail service).
As for monopolies that came into being without any government assistance? Standard Oil is an obvious example. AT&T was another. U.S. Steel was for a period.