same thing that they told me was discussed, i put two and two together. >> as it turns out the same group named by done way was singled out by mcconnell at a news conference tuesday. >> last month my wife's ethnicity was attacked by a left wing group in kentucky and then parentally they also bugged my headquarters. >> reporter: in response to the mcconnell campaign's allegation that the headquarters was bugged, the fbi has launched an investigation. a source close to the campaign says agents pulled the building surveillance footage. >> they were here for about an hour. they checked out the office. they took a lot of pictures. they examined our personal devices. and they, i believe they swept the office. >> reporter: retired fbi agent says the case will likely hinge on whether the conversation could be overheard. >> the investigation is going to have to determine if the individuals are being truthful that they overheard this conversation out in the hallway or near the elevator and the people in the meeting were speaking in such a loud manner