ymu
Niall Ferguson's deep-cover sock-puppet
It hasn't taken hold except in the media though. IMO.
They've got 130+ candidates running for Congress. That's a little more than a media myth. Whether or not they have any long term prospects, I don't know. The Republicans will do worse in these elections because of them, but elections aren't everything. How far rightwards will they manage to drag the political centre of gravity and what sort movement(s) will emerge long-term? Their backers aren't pumping millions in for the sake of it.