in the never-trump camp. later endorsed marko rubio and actually wanted to somehow stop trump at the convention. you know, there was kind of a last-ditch effort to hopefully stop him at the convention, which didn't work, so, yes, mr. singer was definitely anti-trump at the time this oppo research was going on. >> do we know who else was being -- did they seat this opposition research on? i understand it wasn't just donald trump. >> that's a good question. the answer is i don't know. they did say tonight that when the free beacon acknowledged after my report that they published an acknowledgement of all of this, they said in the fall of 2015, donald trump was the leading candidate, if you'll remember back then in the republican race. in the fall of 2015, they started this oppo research project with fusion gps looking into what they called multiple republican candidates including