I no longer regularly read the New York Times op-ed columnist Maureen Dowd. I take no delight in her Pulitzer-winning nastiness, even when I applaud her target being skewered. For sheer vitriol, she has few rivals outside cable TV. So it was with schadenfreude that I read about her passing off an entire paragraph, almost verbatim, from Talking Points Memo blogger Joshua Marshall as her own and offering an explanation that further undermines her credibility.