I understand where Mike is coming from here. But the version of American Government currently in classrooms states that "science doesn't know whether we are experiencing a dangerous level of global warming or how bad the greenhouse effect is, if it exists at all." It also contains a sentence stating that global warming is "enmeshed in scientific uncertainty."
Mike notes that because the disputed statements occur in a U.S. government textbook, they "are more forgivable than if they appeared in a geology text... There is a policy debate about global warming." But the scientific basis of climate change, not the policy, is what is questioned by Dilulio and Wilson. Whether that happens within a science textbook, a math textbook, or a U.S. government textbook is irrelevant, just as it is irrelevant where the scientific basis of evolution is questioned. If, for example, a U.S. government textbook noted that evolution "is controversial, mostly because it is enmeshed in scientific uncertainty," Fordham would no doubt take exception.
Mike writes that "science class should be for science." Then shouldn't U.S. government class be for U.S. government?