The Hillary Clinton campaign is "horrible" at "driving the [media] conversation" and "sucks at spin," billionaire businessman Mark Cuban told Business Insider in an interview this week.

The owner of the NBA's Dallas Mavericks, who backs the former secretary of state, was defending Clinton over a series of controversies, which included her use of a private email server, allegations of "pay to play" against the Clinton Foundation, and her recent health episode.

Cuban said all of those controversies, which have flourished in the media, are media-made issues.

"There's always going to be opposition, no matter who it is, in order to combat that opposition," he said. "You've got to have good spin, good [public relations]. It's the same as in sports."