Hillary Clinton is using the words of Republicans to attack rival Donald Trump.

In the 30-second ad titled "Unfit," various Republicans voice their concerns about a Trump presidency and what he would do with access to the nuclear codes.

"If he governs consistent with some of the things he's said as a candidate, I would be very frightened," former CIA Director Michael Hayden says in a clip from a previous interview.

Another former George W. Bush official from his National Security Council, Gillian Turner, sounds distressed as she talks about remarks made by Trump about using a nuclear weapon against allies of the U.S.

"This is not somebody who would be handed the nuclear codes," Max Boot, a conservative foreign policy analyst says in a clip from a prior news interview.

Conservative columnist Charles Krauthammer then questions Trump's temperament.

"You have to ask yourself, do I want a person of that temperament controlling the nuclear codes? And as of now, I'd have to say no," Krauthhammer remarks in a Fox News interview.

According to the Clinton campaign, the ad will air on national cable television is part of its existing ad buy.

Trump has yet to begin put ads on television since winning the GOP presidential nomination.