Not my question. Someone would have recorded it. I’m sure he was asked, whether it was newsworthy or not. If they can find what Trump said 30 years ago, someone can find this.
To put it differently, Trump was asked back in 1988 by Oprah if he would ever run for President. Just because that exists doesn't mean there must somewhere be a public interview of Rubio in 1988 asking if he'd ever run.