ROGER AILES is (a) the genius who midwifed the astoundingly successful Fox News; (b) the sharpest thorn in the side of Barack Obama; and (c) the most important surviving officer in Rupert Murdoch’s global media army.

You can see why he would be a great subject for a biography. He is also (d) a political operator of the first order, which is why there are now three Ailes books in the works, two of which look to me like pre-emptive strikes by Ailes himself.

We’ll come back to this little publishing intrigue, but first the news: Murdoch Inc. sinks deeper and deeper into crisis. His newspapers hemorrhage money. The political clout that once justified all that red ink is waning, as exposés of illicit phone-hacking, police payoffs and possible lobbying improprieties make him unwelcome company in any politician’s photo op. Murdoch’s hopes of expanding his substantial foothold in British broadcasting have been dashed by the scandals. Last Tuesday, a parliamentary committee, voting on party lines, issued a verdict that Murdoch was “not a fit person” to run a major international corporation. Meanwhile, the acid rain of criminal charges and civil lawsuits continues.

In this beleaguered family of news enterprises, Fox is the good son. It is the most reliable profit center, expected to net a billion dollars this fiscal year. It is untainted so far by the metastasizing scandals. It is a source of political influence more durable than Murdoch’s serial romances with British prime ministers. This year the Fox News Primary probably did more to nominate Mitt Romney than New Hampshire or Michigan.