media and so on to manipulate elections has not been confined to the united states. we've been finding this in france, where i spent a lot of time examining this. in germany, as well, where their big election is coming up this fall. the russians have used social media mostly in trying to manipulate elections according to their own benefit, if you will. so the fact that the fbi had found this kind of interest by russia, the manipulations going into the campaign and through the campaign to election day, that is central, i think, to this case. it could very well mean, again, another important string for mueller's investigators to pull on. >> danny, back to the investigation and i guess the powers of special counsel, as in robert mueller. while the president set the red line about any kind of financial disclosures, probing into family affairs, finances, is there -- can the president have a red line as it pertains to mueller? >> not exactly. when it comes to the grand jury, first of all, they have the