(a) Eric Partridge 1894-1979 was hugely authoritative in the field of slang and neologism in English. (b) He died prior to any of the events under discussion here, making him an unreliable source on them. (c) The [Talk:Campaign_for_"santorum"_neologism/Archive_5#Partridge_revisited quote given] appears to be a posthumous updating of his book (alas I don't have access to this specific edition). (d) Even if the quote were authoritative, it cannot be used either for or against the word neologism in this context, because while it describes santorum as 'the child of a one-man campaign' and not having wide usage (at the time of print, naturally), it neither says nor implies that it is not a neologism.