"Nance began working in the civilian intelligence arena through research into the history of the Soviet Union and its spying agency the KGB. He subsequently analyzed Middle East terrorism and sovereign nations with ties to the Russian Federation.
Nance took part in combat operations that occurred after the 1983 Beirut barracks bombings, was peripherally involved with the 1986 United States bombing of Libya, served on USS Wainwright during Operation Praying Mantis and was aboard during the sinking of the Iranian missile boat Joshan, served on USS Tripoli during the Gulf War, and assisted during a Banja Luka, Bosnia air strike.
In 2001, after retiring from the Navy, Nance founded Special Readiness Services International (SRSI), an intelligence support company. On the morning of 9/11, driving to Arlington he witnessed the crash of American Airlines Flight 77 into the Pentagon. He acted as a first responder at the helipad crash site where he helped organize the rescue and recovery of victims. Subsequently, Nance served as an intelligence and security contractor in Iraq, Afghanistan, the UAE and North Africa.
Between 2005 and 2007 Nance was a visiting lecturer on counterterrorism in Sydney, Australia at Macquarie University's Centre on Policing, Intelligence and Counter-terrorism (PICT) and at Victoria University of Wellington in Wellington, New Zealand.
Nance now directs a think tank that he founded, the "Terror Asymmetrics Project on Strategy, Tactics and Radical Ideologies", which analyzes counterterrorism."
He has the background to write a book about Putin undermining the West... and there are a bulk of foreign policy experts who agree with him.
Of course it's unsurprising that Trump Trolls would mock the idea.