In a televised interview, Clinton once referred to Richard Clarke as "the best guy in the country". This was in the context of his work as an anti-terror strategist. In his career he repelled vigorous attacks upon his credibility and is generally now generally considered to be a generally clued in guy, in general.
Since leaving the Bush administration in 2003 he has continued to prognosticate and expound, Cyber War the latest bee in his bonnet. With an involuntary twitch or hunching of shoulders intended to serve as a diacritic of unease I direct your attention to an Op Ed in the WSJ of the 15th of this month, in which he asserts that agents of the Chinese government have made swiss cheese of United States utilities and business computing infrastructure in a broad and heinous manner, and that the current US Administration "is failing in its responsibility to protect the rest of America from Chinese cyberattack".
I express unease not only because of the impressive catalogue of breaches specified, but also because the language at times veers into the purple-rayed chest-pounding patriotic hyperbole for which the American media has for some time been renowned. Worth mentioning also is that Clarke now chairs "a strategic planning and corporate risk management firm", for whom no doubt fear is good business.
Impenetrably murky. Likely probably maybe certainly someone is making a nest in critical American infrastructure computing in a way that does not make sense if they are not government-backed, but that means nothing. You should probably read the Op Ed anyways.