It's David Callahan, an editor for a leftwing website.  The quote was from an opinion piece he had on huffpo that was talking about why Obama won in 2012 and praising how intelligent he was for voting for Obama.  Apparently leaving a vague name at the end of your quote makes it more credible.  I couldn't say for sure, though.  I don't live in one of them there big cities so I must be an idiot.