I don't use politwitter, but it looks like you have to sign up yourself yourself.
PS. Looks better if you click on the pic.
PPS. Could also be a prank. The original twitter feed is clearly his; someone unbeknownst to Ted might have signed him up for politwitter, and removed a strategic letter from his name. In which case politwitter should review is security features.
UPDATE: David Sands says the origonal Ted Morton twitter feed, and the politwitter stuff, are "not real", which I would assume means we are looking at a case of impersonation. Someone is going to have some legal troubles.
PPPS. Unless that "Satire" note at the end of the politwitter entry there is enough to get the satirist off the hook. I'm not sure the people responding to his "tweets" have figured that out, and he links to the actual Ted Morton website, which seems like a possible no no.