Roger Ailes, who transformed cable news and then American politics by building Fox News into a ratings powerhouse, died Thursday. He was 77.
The death was announced by his family and reported on Fox News Channel. There was no immediate information on a cause of death.
"I am profoundly sad and heartbroken to report that my husband, Roger Ailes, passed away this morning," his wife, Elizabeth, said in a statement. "Roger was a loving husband to me, to his son Zachary, and a loyal friend to many. He was also a patriot, profoundly grateful to live in a country that gave him so much opportunity to work hard, to rise -- and to give back."
Sean Hannity, a prime time host and longtime face of the network, said on Twitter: "Today America lost one of its great patriotic warriors."
Ailes started Fox News almost from scratch in 1996. With its slogan "Fair & Balanced," the network grew into not just the cable news ratings leader but a profound influence on the right wing of American politics.
Fox News promoted Republican candidates and causes and relentlessly attacked what it perceived to be liberal bias in the mainstream media and the entertainment industry.
Ailes was arguably the most powerful man in American media when he suddenly lost his job last summer. Gretchen Carlson, a former Fox anchor, sued him for sexual harassment, and other women came forward to support her claims. Carlson settled with 21st Century Fox, the network's parent company, for $20 million.
Carlson said there had been at least six instances when Ailes talked about her body, intimidated her or used demeaning language. At least six other women, including former Fox News star Megyn Kelly, came forward to accuse Ailes, who denied wrongdoing.
His departure was only the beginning of a troubled period for the network. Bill O'Reilly, its pugnacious prime time star, was forced out in April after The New York Times reported that Fox News had paid $13 million to settle claims from five women of inappropriate behavior.
All told, Fox and its parent company have paid $45 million in settlements related to sexual harassment scandals.
Ailes never removed himself fully from Republican politics. He began advising Donald Trump at a private lunch days before he launched his presidential campaign in June 2015. Over the next year, they met repeatedly, almost always at Fox News headquarters, and spoke regularly on the phone, sources told CNNMoney.
They kept the line of communication open ever after a feud erupted between Trump and Kelly, who, in a question at a Republican primary debate, had questioned Trump's treatment of women. Ailes attended prep sessions before Trump's debates with Hillary Clinton in the general election.
Long before Fox News, Ailes was a Republican operative who saw long before most what television could do for the party.
As an aide to President Richard Nixon in 1970, he prepared a 300-page memo titled, "A Plan for Putting the GOP on TV News."
"Today television news is watched more often than people read newspapers, than people listen to the radio, than people read or gather any other form of communication," the memo read. "The reason: People are lazy. With television you just sit -- watch -- listen. The thinking is done for you."
Three years earlier, in 1967, Ailes is said to have confronted Nixon, who had lost the presidency in 1960 to the telegenic John F. Kennedy, and told him: "Television is not a gimmick. And if you think it is, you'll lose again."
A few weeks later, Nixon hired Ailes as a media adviser for his 1968 presidential campaign.
By the 1980s, Ailes was so influential in Republican politics that Ed Rollins, Ronald Reagan's former campaign manager, described him as "our Michelangelo."
In 1984, Ailes provided Reagan a one-liner to rebut any questions about his mental stamina or advancing age. The result -- "I will not make age an issue of this campaign; I am not going to exploit, for political purposes, my opponent's youth and inexperience" -- was one of the most memorable lines in the history of presidential debates.
Ailes also worked for George H.W. Bush, who won the presidency four years. When Bush sat down for an interview with Dan Rather in 1988, it was Ailes who pushed the then-vice president to attack the CBS News anchor over questions regarding the Iran-Contra affair.
--CNNMoney's Tom Kludt contributed to this report.