>> that phrase you use, exculpatory information. prosecutors can be punished for that. nobody seems anxious to punish bob mueller. maybe giuliani has a point. a new report claims that president trump's former attorney, michael cohen, who famously said he had never been to prague may have been there in the summer of 2016, according to cell phone tower evidence. that, as you know, is one of the most explosive allegations in the various trump -- details in the trump dossier. is this anything real or is it hearsay upon hearsay? >> i think, mark, you hit upon it. i think it is hearsay upon hearsay. it reminds me of the very steele dossier that was the source of this information in the first place, that has been unverified. it is still unverified to this day. it relies upon mysterious