The New York Post reported that MTV filmmaker Josh Kreigman — who also used to work as Mr. Weiner’s congressional district director — has been following the candidate around his campaign trail, filming and recording every step of the way. He rides with the candidate.

Meanwhile, Mr. Weiner always carried a black microphone box in his back pocket, The Post said.

Campaign officials are coy about the taping, saying only that it’s not for a television ad. Mr. Kriegman wouldn’t comment, either. But one observer who’s attended many of Mr. Weiner’s campaign events said the two have been tied at the hip lately.