It's true. He literally repeated the same information about China three times in the debate yesterday, nearly verbatim. Not only that, but he told the same store about only being able to find a single American contractor for a defense item that he told in another one of the debates. He also looked stiff and irrelevant, though not as irrelevant as Tancredo or Brownback. All three of them should drop out of the race immediately. They have all failed to gain any traction.
You are correct. Their impact on the debate is minimal now and they should drop out.