Top US legal experts voice outrage at the torture of Bradley Manning
Obama says the treatment of Bradley Manning is "appropriate and meets our basic standards". 250 legal experts say it "is not only shameful but unconstitutional".
By Ed Pilkington
More than 250 of America's most eminent legal scholars have signed a letter protesting against the treatment in military prison of the alleged WikiLeaks source Bradley Manning, contesting that his "degrading and inhumane conditions" are illegal, unconstitutional and could even amount to torture.
Tribe joined the Obama administration last year as a legal adviser in the justice department, a post he held until three months ago.
The US soldier has been held in the military brig since last July, charged with multiple counts relating to the leaking of thousands of embassy cables and other secret documents to the WikiLeaks website.
Under the terms of his detention, he is kept in solitary confinement for 23 hours a day, checked every five minutes under a so-called "prevention of injury order" and stripped naked at night apart from a smock.
Tribe said the treatment was objectionable "in the way it violates his person and his liberty without due process of law and in the way it administers cruel and unusual punishment of a sort that cannot be constitutionally inflicted even upon someone convicted of terrible offences, not to mention someone merely accused of such offences".
The harsh restrictions have been denounced by a raft of human rights groups, including Amnesty International, and are being investigated by the United Nations' rapporteur on torture.
Tribe is the second senior figure with links to the Obama administration to break ranks over Manning. Last month, PJ Crowley resigned as state department spokesman after deriding the Pentagon's handling of Manning as "ridiculous and counterproductive and stupid".
As commander in chief, Obama is ultimately responsible for Manning's treatment at the hands of his military jailers. In his only comments on the matter so far, Obama has insisted that the way the soldier was being detained was "appropriate and meets our basic standards".
The protest letter, published in the New York Review of Books, was written by two distinguished law professors, Bruce Ackerman of Yale and Yochai Benkler of Harvard. They claim Manning's reported treatment is a violation of the US constitution, specifically the eighth amendment forbidding cruel and unusual punishment and the fifth amendment that prevents punishment without trial.
He said Manning's conditions were being used "as a warning to future whistleblowers" and added: "
The list of professors who have signed the protest letter includes leading figures from all the top US law schools, as well as prominent names from other academic fields. Among them are Bill Clinton's former labour secretary Robert Reich, President Theodore Roosevelt's great-great-grandson Kermit Roosevelt, the former president of the American Civil Liberties Union Norman Dorsen and the novelist Kwame Anthony Appiah.