(VIDEO AT LINK) In an interview with Howard Kurtz on CNN, Politico's Jonathan Martin still can't explain what exactly it is that Herman Cain reportedly did to the women who received payouts from the National Restaurant Association. Mr. Martin's main argument is because the story hasn't been fully challenged, it must be true. Here's a partial transcript of the back-and-forth between Martin and Kurtz. Howard Kurtz, CNN: "Jonathan Martin, let's talk about the first story last Sunday, you and three colleagues reported this and what it didn't contain in the way of details. Here's the language from the story. Sexually...