Left not only scraping the bottom of the barrel...
I think they scraped a hole in it and are working their way through topsoil. Invoking Nixon, for God's sake. What next? Herbert Hoover? Big problem with this one, is that most of the Democratic target voters are going to ask, "who the hell is Nixon?"
I do agree with Lindy that once the talking points go out, you'll probably hear "Nixon" from every one of the usual suspects.