A conservative national security expert and Weekly Standard writer responded with horror to a report that Republican presidential nominee Donald Trump has repeatedly asked his foreign policy advisers, “Why can't we use nuclear weapons?"

During an August 3 interview with former CIA and NSA director Michael Hayden, MSNBC host Joe Scarborough relayed how “a foreign policy expert” advising Trump told Scarborough that Trump had asked the adviser three times, “If we have [nuclear weapons], why can’t we use them?” According to the network, Scarborough only learned of Trump’s baffling approach to the United States’ nuclear arsenal “in the last few days” before reporting it. From Morning Joe:

Conservative national security analyst John Noonan -- who periodically writes about national defense issues for The Weekly Standard and previously served as an adviser to 2012 Republican presidential nominee Mitt Romney and to 2016 presidential hopeful Jeb Bush -- slammed Trump on Twitter. Noonan’s nuclear expertise stems from his U.S. Air Force service, including work as a missile-launch officer at a nuclear silo in Wyoming. Noonan wondered if Trump understands “how F’ing dangerous” his foreign policy stances are, hit the nominee for “undoing 6 decades of proven deterrence theory,” and lamented the position of officers down the chain of command who are “[w]ondering if they’ll soon answer to a madman”:

1. I cant get this in one tweet. So bear with me as I air some laundry here on Scarborough's claim Trump's interested in nuclear First Use

— John Noonan (@noonanjo) August 3, 2016

2. Pulled 300 nuclear alerts, 100 ft under the Wyoming turf. Job is serious and full of serious people.

— John Noonan (@noonanjo) August 3, 2016

3. When we went into ICBM training, we went through a battery of tests and interviews. Are you sane? Are you willing to turn your key?

— John Noonan (@noonanjo) August 3, 2016

4. I see how those might sound at odds.

— John Noonan (@noonanjo) August 3, 2016

5. But the whole idea behind nuclear deterrence is that you don't use the damn things. So I thought the mission credible and worthy.

— John Noonan (@noonanjo) August 3, 2016

6. There are a hell of a lot of bad actors out there who have nukes. They are restrained only by our ability to instantly lay waste to them.

— John Noonan (@noonanjo) August 3, 2016

7. The nuke triad, which Trump doesn't have a clue about, has been the single greatest contributor to global peace for decades. You heard me

— John Noonan (@noonanjo) August 3, 2016

8. I dont know if Scarborough is telling whole truth here. Anonymous sources suck. BUT... if he is... buckle the hell up.

— John Noonan (@noonanjo) August 3, 2016

9. Because Trump would be undoing 6 decades of proven deterrence theory. The purpose of nukes is that they are never used. Trump disagrees?

— John Noonan (@noonanjo) August 3, 2016

10. This would be the single greatest strategic shift in US national security in decades. In a Trump Presidency, our foreign policy

— John Noonan (@noonanjo) August 3, 2016

11. ....would be this. “Leave our alliances, fall back on a nuclear first use policy.” Does he understand just how F'ing dangerous that is?

— John Noonan (@noonanjo) August 3, 2016

12. But what really concerns me, as a former nuke guy, is the idea of a narcissist walking around with nuclear authenticators.

— John Noonan (@noonanjo) August 3, 2016

13. I could sit 100ft underground, on alert, knowing that the POTUS would not make me do my duty -- not unless it was absolute last resort

— John Noonan (@noonanjo) August 3, 2016

14. But imagine having to turn launch keys not knowing if we were under attack or if it was b/c foreign leader said a mean thing on twitter

— John Noonan (@noonanjo) August 3, 2016

15. The power is there to kill millions. Permanently alter the geopolitical landscape. It is a sacred, sobering responsibility.

— John Noonan (@noonanjo) August 3, 2016

16. Idea that nukes would be used, say over Raqqa or Mosul, simply because we have no more allies and it's a simple, easy fix is nauseating

— John Noonan (@noonanjo) August 3, 2016

17. Simply signaling that you're open to using strategic weapons as a tactical solution rewrites the rule book. Russia, China, others will

— John Noonan (@noonanjo) August 3, 2016

18. respond. Nuclear deterrence is about balance. Trump is an elephant jumping up and down on one side of the scale. So damn dangerous.

— John Noonan (@noonanjo) August 3, 2016

19. But geopolitics aside, I can't get my mind off the young officers on nuke alert right now. Wondering if they'll soon answer to a madman.

— John Noonan (@noonanjo) August 3, 2016

20. And be asked to do a duty that should morally be asked of no human being, ever. //end

— John Noonan (@noonanjo) August 3, 2016

Noonan was not alone in criticizing Trump’s reported interest in using nuclear weaponry. Steve Breen, an editorial cartoonist for the right-leaning San Diego Union-Tribune, mocked the nominee with a depiction of a hypothetical President Trump being physically restrained from launching a nuclear assault in response to criticism from a constituent in Wichita, Kansas: