i want to broaden out to the issue of charter school. we talked about tenure and talked about the sort of this democrats who maybe have a problem with teachers union on that issue and you look at the divide between democratic player and unions. you said this in your piece, the ten biggest mayors, nine of them are pro -- besides bill de blasio. >> this is an issue with teachers unions have a lot ever concerns and problems with the charter school unit. as a liberal you're pro charter. >> i'm fro non-profit charter, no pro any form of education that is for profit. we have some for profit schools but it's against the law to have new for profit schools. but i certainly think the record in new york and i can't address the national figures as clearly, but certainly in new york city