The New Republic’s Julia Ioffe has penned a pretty extraordinary piece on TNR’s website attacking NYU Professor emeritus and Nation contributor Stephen F. Cohen’s latest article on U.S.-Russia policy, which he co-authored with his wife Katrina vanden Heuvel. Cohen, perhaps the country’s foremost scholar of Russian studies, certainly doesn’t need my help in defending himself against what amounts to a scurrilous – and frankly hysterical – ad hominem attack on his work and character.