Roger Ailes, a former U.S. presidential adviser who started the Fox News Channel to promote a Republican agenda and built it into the most-watched U.S. cable news network before resigning amid sexual harassment allegations, has died. He was 77.

Fox News confirmed his death Thursday.

Ailes started Fox News in 1996 at the behest of News Corp. Chairman Rupert Murdoch as an alternative to what they saw as a media landscape dominated by liberals. Although marketed as "fair and balanced," critics of the conservative content of the channel's programs accused it of acting as a propaganda arm of the Republican Party.

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One reason: An Ailes deputy sent reporters and news show hosts memos stating what the message of the day should be. The notes directed positive coverage for Republican politicians and negative news about Democrats.

"It's an entire network, devoted 24 hours a day to an entire politics, and it's broadcast as 'the news,' " said Robert Sean Wilentz, a professor of history at Princeton University and author of The Age of Reagan, according to a 2011 Rolling Stone article. "That's why Ailes is a genius. He's combined opinion and journalism in a wholly new way — one that blurs the distinction between the two."

Breaking News: Former Fox News chairman and CEO Roger Ailes has died, his family announced. pic.twitter.com/AksPdNSZaI — Fox News (@FoxNews) May 18, 2017

Using such tactics, Fox grew in popularity, eclipsing rivals Cable News Network and MSNBC. FNC's 2014 prime-time audience of 1.7 million households was more than the combined number of viewers of the other two, according to the Pew Research Center.

In July 2016, Ailes was ousted as head of Fox News after a sexual harassment lawsuit was filed by a former anchor, Gretchen Carlson, who claimed she was fired for refusing his sexual advances. Ailes said Carlson's allegations were false and her lawsuit was in retaliation for the network's decision not to renew her contract because her "low ratings were dragging down the afternoon lineup."

Carlson left the network and received a $20 million settlement from Fox several months later. Her accusations were followed by claims of harassment from other women, including Fox News host Andrea Tantaros. The scandal also engulfed one of the network's biggest stars, Megyn Kelly, who said that Ailes harassed her. Kelly left the network in early 2017.

On 2014 revenue of $2.1 billion, Fox News made a profit of $1.1 billion, according to Pew. That made it the most profitable division of 21st Century Fox, its parent, according to the 2013 authorized biography Roger Ailes: Off Camera by Zev Chafetz, who previously wrote a biography about Rush Limbaugh and became a Fox News contributor.

Given his mission, Ailes hired conservatives, including eventual star commentators Bill O'Reilly and Sean Hannity. He lured anchor Neil Cavuto and others from CNBC, the leading cable business channel, where Ailes had been president prior to starting Fox News.

Ailes ruled with a volatile temper and domineering behavior, according to a 2014 unauthorized biography The Loudest Voice in the Room: How the Brilliant, Bombastic Roger Ailes Built Fox News — and Divided a Country by Gabriel Sherman.

He once punched a hole in the wall of an NBC control room where he was producing The Tomorrow Show, according to the Chafetz book. Ailes told the author: "It was just a drywall, and luckily I didn't hit any beams. But somebody put a frame around the hole and wrote, 'Don't mess with Roger Ailes.' "

Fox became a refuge for out-of-office conservative politicians, including Sarah Palin, John Kasich, Rick Santorum, Newt Gingrich and Mike Huckabee. Some, such as Kasich, went on to run for office again.

Under Ailes, Fox News was credited with helping to create the anti-government Tea Party movement and aiding the GOP takeover of both chambers of Congress in 2014 for the first time in eight years.

Roger Eugene Ailes was born May 15, 1940, in Warren, Ohio, to Robert Ailes, a factory foreman, and his wife Donna. He had hemophilia yet his father sometimes beat him with a belt, according to Sherman's biography.

Elizabeth Ailes: "Roger was a patriot, grateful to live in a country that gave him so much opportunity" https://t.co/uXXgyH6nVH pic.twitter.com/AMiOplFvhJ — ABC News (@ABC) May 18, 2017

He attended Ohio University, in Athens, where he acted in plays and worked at the radio station. After graduating in 1962, he landed an entry-level job on The Mike Douglas Show, a daytime variety program initially based in Cleveland. A television wunderkind, he rose to executive producer by age 25 and was nominated for an Emmy in 1968.

In 1967, while working at the show, Ailes met Richard Nixon and lectured him on the importance of television following the politician's failed runs for the presidency in 1960 and for governor of California in 1962. He was hired to help shape Nixon's public image during the 1968 presidential campaign and was later fired for negative remarks he made about the Republican candidate to Joe McGinniss for his book The Selling of the President 1968.

Ailes got some of his ideas for Fox News from his work for Joseph Coors, the right-wing beer magnate, who in 1974 asked him to be the news director at Television News Inc., a network that supplied free video to local stations to inject conservative content into broadcasts. TVN, whose slogan was "fair and balanced," shut down within a year.

In the 1980s, his skills as a television producer and political consultant fused. Ailes advised President Ronald Reagan in his 1984 re-election campaign, crafting TV ads and suggesting how the aging ex-actor could improve his debate performances.

"I am not going to exploit, for political purposes, my opponent's youth and inexperience," Reagan memorably said during a debate with Democratic candidate Walter Mondale.

Ailes helped George H.W. Bush win the presidency in 1988 and advised Bush again four years later in his unsuccessful re-election bid.

In the early 1990s, he also became an executive producer for a short-lived television program starring Limbaugh, host of a successful right-wing radio talk show.

In 1993, he became president of CNBC, a cable business network. During his three years there, he "more than quintupled profits and minted stars like Chris Matthews and Maria Bartiromo," according to the Rolling Stone story.

Ailes eventually rose to chairman and CEO of Fox News and Fox Business Network and chairman of Fox Television Stations.

His marriages to the former Marjorie White and Norma Ferrer ended in divorce. In 1998, he married the former Elizabeth Tilson. The couple had a son, Zachary, according to Marquis Who's Who.

From Bloomberg News

Posted by Breaking News editor Matt Peterson