What's left, right, and read all over?

The blogosphere, of course.

And echoing Matt's crit of a piece in today's ProJo, Portfolio (h/t Romenesko) reports that the liberal side of the Interwebz is outdrawing its conservative counterpart:

It's Arianna's election; the rest of us are just watching it.

The Huffington Post drew more than 4.5 million unique visitors in September, making it the most-trafficked stand-alone political website or blog, according to figures just released by ComScore. Huffpo's traffic increased by 474 percent versus September 2007.

In comparison, the Drudge Report drew a little over 2 million uniques, up 70 percent year-over-year. Edging Drudge out for the No. 2 slot on the list is Politico.com, which attracted 2.36 million uniques, a 344 percent jump.

Other big gainers included RealClearPolitics.com (1.1 million uniques, up 489 percent), Daily Kos (923,000 uniques, up 381 percent), and TalkingPointsMemo.com (458,000 uniques, up 1,321 percent). Although a majority of the fastest-growing sites lean to the left, conservative Newsbusters.org was up 547 percent with 732,000 uniques.

The full list is here.