bill maher is broadly new left, but he's not a leading figure, and not an intellectual.
maher's biggest claim to fame is that he has a habit of thinking he's really smart, and having it blow up in his face when it's demonstrated that he's not. he's right once in a while, granted - makes the odd point worth taking note of. but, broadly speaking, he's a dolt.
he's on the new left's side of the spectrum, though. mostly.