I believe it is real.
http://www.goodreads.com/author/quotes/32408.James_Carville
http://thinkexist.com/quotes/james_carville/
http://answers.yahoo.com/question/index?qid=20120906071926AAB1gjM
http://www.independentsentinel.com/2012/09/dnc-highlights-from-a-reformed-liberal/
Based on a bunch of bloggers cutting and pasting each other?
No. Just no.
Again, a sourced quote is required here.
From the Office of James Carville: “The quote was falsely posted by an unknown user to a quotations website called thinkexist.com. We have contacted the website and asked them to take the quote down. James Carville never said these words, and this quote in no way belongs to James Carville.”