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Television personality and commentator Charles Krauthammer has died at age 68

Longtime columnist and television personality Charles Krauthammer died Thursday following his battle with cancer.

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His death was announced by two organizations that employed him, Fox News Channel and The Washington Post.

The 68-year-old had been paralyzed below the neck in a diving accident yet graduated from Harvard Medical School in 1975 and practiced psychiatry.

He later developed a career as a Pulitzer Prize-winning author and commentator.

Krauthammer is credited with coining the term “The Reagan Doctrine” for President Reagan’s policy of aiding anti-Communist movements worldwide. He was a leading advocate for the Iraq War and a prominent critic of President Barack Obama, whom he praised for his “first-class intellect and first-class temperament” and denounced for having a “highly suspect” character.

In early June,  "A note to readers," was published by The Washington Post, Krauthammer, wrote that he had a cancerous tumor removed from his abdomen in August. There were setbacks in his recovery that prevented him from working, but he thought he was making progress in his recovery.

The cancer has returned in an aggressive form, Krauthammer wrote.

"This is the final verdict. My fight is over," Krauthammer wrote.

In the post, Krauthammer thanked those who have assisted him during his medical treatment. He also thanked his Washington Post and Fox News colleagues, readers and viewers.

FILE - In this March 31, 2015 file photo, Charles Krauthammer talks about getting into politics during a news conference in Corpus Christi, Texas. (Gabe Hernandez/Corpus Christi Caller-Times via AP)

Krauthammer said he is leaving this life with no regrets.

The Associated Press contributed to this report.