Looking him up briefly, he did apparently state once he regretted instituting Stop n' Frisk in New York, saying it didn't work (not necessarily that it was morally wrong). The date for that, however, was November of last year... 4 months ago. Conveniently right on the eve of him starting his presidential bid.
For me, the problem with him is we have seen him in political action when he was mayor - and his actions were always went towards Traitorpublican desires, never Democrat. He's done little to disavow his previous actions, and indeed some of his current policies are aligned with Traitorpublican Views, particularly healthcare.
And lets not forget he was a 1-term mayor, who immediately got his ass booted out of office for being an awful mayor. For most companies I've known, when you get fired - you don't get promoted to CEO. >_<