“Objective journalism is one of the main reasons American politics has been allowed to be so corrupt for so long. You can't be objective about Nixon.”

"It Didn't Work" http://www.nationalreview.com/buckley/buckley200602241451.asp in National Review Online (2006-02-24).
Context: One can't doubt that the American objective in Iraq has failed.... Our mission has failed because Iraqi animosities have proved uncontainable by an invading army of 130,000 Americans. The great human reserves that call for civil life haven't proved strong enough. No doubt they are latently there, but they have not been able to contend against the ice men who move about in the shadows with bombs and grenades and pistols.
The Iraqis we hear about are first indignant, and then infuriated, that Americans aren't on the scene to protect them and to punish the aggressors. And so they join the clothing merchant who says that everything is the fault of the Americans.

Free the Airwaves! (2002)

BBC World interview (2003)

Resignation letter to President George W. Bush, dated (2 November 2004)

Speech at TEDGlobal 2010

1970s, Fear and Loathing: On the Campaign Trail '72 (1973)
Context: So much for Objective Journalism. Don't bother to look for it here — not under any byline of mine; or anyone else I can think of. With the possible exception of things like box scores, race results, and stock market tabulations, there is no such thing as Objective Journalism. The phrase itself is a pompous contradiction in terms.

As quoted in Totalitarian Temptation http://www.friesian.com/gonzalz2.htm#note-9 (1976).
1970s

On why she left journalism in “How former Register reporter Thanhha Lai turned childhood rage into a National Book Award” https://www.orangecoast.com/features/ha/ in Orange Coast Magazine (2012 Feb 11)

Source: On War (1832), Book 6, Chapter 1.