its dated 2010
I know - this is a Dem document from Boxer’s 2010 campaign. But was it publicly available before? Opposition research is very expensive - campaigns don’t just release it. IMHO, Bush’s campaign released it because iCarly is a bigger threat to him moving up in the polls (and in measures of electability) than she is to Trump.
Of course, DT might have done it, but I don’t think he’s anywhere near as desperate (which is to say, not at all) as Bush.