From a July 24 open letter Southern Poverty Law Center president J. Richard Cohen addressed to CNN president Jonathan Klein:

On the July 15 edition of "Lou Dobbs Tonight," Mr. Dobbs questioned the official certificate provided by the president and the State of Hawaii and complained that President Obama has not made public the “original document.” On his radio program, Mr. Dobbs has repeatedly questioned the president's fitness for office, demanding he “show the documents” and, at one point, jokingly suggesting President Obama may be “undocumented.”

The truth about the president's birth is not in dispute. It has been verified by Factcheck.org, among many other serious news organizations, and his official birth documents have been made public. CNN itself has repeatedly reported on the falsity of the claims of the “birthers,” and the network's esteemed legal analyst, Jeffrey Toobin, recently called those claims “a joke.” As you know, even Mr. Dobbs' frequent fill-in anchor, Kitty Pilgrim, debunked the birthers on the July 17 edition of Mr. Dobbs' own CNN show. The fact that Mr. Dobbs suggests otherwise on CNN - while real CNN reporters tell the truth - is both deplorable and an embarrassment to all serious journalists.

[...]

This is not the first time Mr. Dobbs has pushed racist conspiracy theories or defamatory falsehoods about immigrants. We wrote you in 2007 to bring to your attention his utterly false claim that 7,000 new cases of leprosy had appeared in the United States in a recent three-year period, due at least in part to immigrants. (The real number, according to official statistics, was about 400. Mr. Dobbs took his spurious information from the late right-wing extremist, Madeleine Cosman.) In addition, Mr. Dobbs has reported as fact the so-called Aztlan conspiracy, which claims that undocumented Mexican immigrants are part of a plot to “reconquer” the American Southwest. He has suggested there is something to a related conspiracy theory that claims the governments of Mexico, the United States and Canada are secretly planning to merge into the “North American Union.” He has falsely claimed that “illegal aliens” fill one third of American prison and jail cells. And Mr. Dobbs has routinely disparaged, on CNN's air, those who have had the integrity to point out the falsity of these and similar claims.

Respectable news organizations should not employ reporters willing to peddle racist conspiracy theories and false propaganda. It's time for CNN to remove Mr. Dobbs from the airwaves.

Previously:

CNN “conspiracy theorist” Lou Dobbs discredits his network -- one wild claim at a time

As Dobbs digs in, CNN rebuts, ridicules, distances itself from birth certificate claims