I came across this graph at Prof. Brad DeLong's website:
Prof. DeLong said he hoisted it from Edge of the American West, who in turn copied it from Steve Benen of Washington Monthly, who in turn said it was created using data from the Daily Kos weekly tracking poll! So I guess it is coming back home in another form.
This is the loathed, regional, rump party some of our leaders are afraid of? This is the party some Septuagenarian Senators believe must be appeased?
Now, I could write three paragraphs of thoughtful drivel to comply with the technical requirements of the FAQs, but really, this graph speaks volumes all by itself.