The video is here.
Santorum does not speak the word "black". THIS IS A 100% FLAT OUT LIE BY SEE-BS.
I can see how someone can hear “black people” - that’s what I heard the first time, but it doesn’t make sense in context. Unless he was thinking “black people” the whole time when he was talking about the dependent class and it just slipped out then. But he wasn’t, not in Iowa.
My guess is that what he said was “a lot of” people rather than “black” people.