Thats actually from "Comment is Free" (CiF), the most prominent part of the Guardian's online arm, rather than the Guardian itself - they do occasionally have reasonably sane pieces on there, but the vast majority of the articles are insanely pro-Obama and taken directly from Huffington and Kos.
Nick Cohen (the author) however is an interesting fellow who has migrated from the left towards conservatism; he is wrong about some stuff but that article was very close to the mark, hence the vast outpouring of grief within the Comments field.