John Noonan, who also advised 2012 Republican presidential nominee Mitt Romney on foreign policy, sent a slew of tweets ripping Trump's answers in an NBC forum on national security and referring to Trump as a "lunatic."

I'd love to see Trump look Jim Mattis, John Allen, David Petraeus, Stanley McChrystal in the eye and say "I know more about ISIS than you." — John Noonan (@noonanjo) September 8, 2016

"We would leave 'certain groups' behind, where the oil is, and they would take the oil."



What groups? This is an incredible statement. — John Noonan (@noonanjo) September 8, 2016

"I have a very substantial chance of winning."



About 21%, according to latest aggregates. — John Noonan (@noonanjo) September 8, 2016

My God, and I thought Hillary was bad. Trump's making her look like Dwight Eisenhower. — John Noonan (@noonanjo) September 8, 2016

"We need to set up a court system within the military."



Like... the Uniformed Code of Military Justice? — John Noonan (@noonanjo) September 8, 2016

This comparing Obama to Putin crap should be a red line for all US citizens.



If you want to sell"America first," then be an American first. — John Noonan (@noonanjo) September 8, 2016

I have spent 7 years knocking Obama's foreign policy.



You cannot, CANNOT, compare US president to a thug like Putin. That's so damn wrong. — John Noonan (@noonanjo) September 8, 2016 ADVERTISEMENT Noonan at one point Noonan at one point did credit Trump , the Republican presidential nominee, for addressing "a real problem" of "diminished American prestige overseas," but he said Trump's answer fell short and said Trump "just can't land the punch."

Noonan, a supporter of the Never Trump movement, similarly ripped Trump last month as "mentally unfit" to be in charge of the nation's nuclear arsenal.

If I'd done, as a US Air Force captain, what Hillary did with classified. I'd be making small rocks out of big rocks at Leavenworth. — John Noonan (@noonanjo) September 8, 2016

This "well it wasnt marked classified" is wrong. So I could send our nuclear targets over gmail, and then say "look, not classified!?" C'mon — John Noonan (@noonanjo) September 8, 2016

HRC team has to stop with this obfuscating. She plays into all the bad stereotypes about slick Clintons. "I was wrong." Move on. — John Noonan (@noonanjo) September 8, 2016

These Qs are crushing, would tank any normal candidate. And we haven't even got to Benghazi. But GOP nominated a lunatic. So here we are. — John Noonan (@noonanjo) September 8, 2016

Hillary has a lot of debate work to do. But still has a huge advantages over Trump. She knows things. Trump doesn't. She's sane. Trump isn't — John Noonan (@noonanjo) September 8, 2016