to enter the democratic public primary. he's expected to file the necessary paperwork to get on the ballot in alabama. yes, it has flirted with a presidential run in the past, but he announced in martha he was not getting in. and this is what he told me in just late september. >> would you like to make an announcement today? >> yeah, i'll make an announcement that i'm comfortable with my decision. look, i was educated as an engineer. engineers try to solve problems. i was lucky enough to be mayor of new york city for 12 years. we solved a lot of problems. not perfectly, but we made a difference. and the truth of the matter is when you look at the layout of who is going to vote and where the country is, i would be unlikely to get elected, but in the private sector, i can make a difference. >> so what changes?