I doubt O-Reilly has any inside info from Trump but I will say this: Trump cannot run again after this and ideally his selection should be ready to lead the party in a post-Trump populist movement and uniparty guys like Rubio aint it. Rubio would just guarantee that Trump becomes a footnote in the story of the relentless march towards left-wing totalitarianism.
Never forget that Rubio got into office by running as a hard-core tea party guy, which lasted like five minutes after he got sworn in. What that proves: Rubio will say anything to get elected and he doesn't mean any of it.