Broadcaster Alan Jones has issued an extraordinary threat to Liberal Party members who are considering challenging Hughes MP Craig Kelly for preselection, indicating he will use his program to attack them if they decide to run.

Mr Kelly's most likely challenger is Sutherland Shire councillor Kent Johns, a member of the Liberal Party's left faction.

Fairfax Media has previously reported that members of Mr Kelly's right faction were hopeful that Jones would use his program to attack Cr Johns' likely preselection challenge.

After an interview with Mr Kelly on Tuesday morning, Jones declared: "You're not going to get anyone better than that bloke."