why don't they say so? >> i don't think they are proud. i don't think the republicans want everybody to know who's paying for these ads. i think it would be very unpopular. i think the people of missouri, if they knew who were paying for these ads against me, i think they'd be proud of the enemies i've made. >> do you know who they are? >> i don't know who they are. i've got some good guesses. but i don't know who they are. we're trying to get this thing passed and i think we have to keep the pressure up on this. they say why do you keep bringing this up? because people are upset about it. at claire mccaskill.com/disclose act, sign on to be a cosponsor of the bill. a citizen cosponsor. let's not let these guys buy these elections out from under us. >> the koch brothers, adelson, let's make the worst assumptions. go to the worst case. today the senate minority leader criticized the disclose act