>> dana: the former new york city mayor trying to start his candidacy with a massive ad buy. over $30 million to influence voters in key primary states and the company he founded "bloomberg news" caused controversy per the news outlets as it'll continue their "tradition" of not investigating bloomberg, his family, foundation, and will do the same with other democratic candidates. president trump is not off-limits. going to continue to cover him. can get into all of this. juan, can i go to you first? what is the constituency for a bloomberg run? >> juan: you have a lot in the donor class on the democratic side, wall street side who historically backed hillary clinton and are externally nervous about elizabeth warren. they were in apoplexy. they thought, if elizabeth warren gets it, what