Yes - can someone here give more detail about the ad please?
I have not seen the ad, but I would be VERY surprised if O'Reilly allowed his interview to be used this way. It would contrary to his ethic and personality. You may not like his approach, but he is not overtly partisan in the manner of Rather et al.
It may be that the Dems have used some of the clips he's already broadcast without his approval.
Time will tell.