Ivan Eland: Although closing Guantánamo would be important symbolically, the law-free sanctuary that the Bush administration had achieved there has already been eroded by the Supreme Court’s demand that detainees have some legal rights. And even if the Obama administration closes Gitmo, some of Bush’s unconstitutional policies would continue in prisons around the United States—for example, the use of military tribunals for some detainees and the detention of some former Guantánamo detainees indefinitely without trial.