Only if it political in nature.
Otherwise, slander, libel and defamation laws are unconstitutional.
Palin could sue to get reimbursed for her time and money spent for her to travel to DC to be interviewed by this clown, under false pretenses.
She believed he represented a nonprofit Veterans Organization and was volunteering her time. But in reality he was doing a TV show for his own profit.
That is where she has the basis for her suit if she chooses.................
She is a public figure. She is a political figure.
This would be true if he did the same thing to Hillary or Pelosi.
Any legal action would be a real stretch and in the end, they would lose.