parts of the affordable care act he would keep. >> when you replace it, will you make sure people with pre-conditions are still covered? >> yes. it happens to be one of the strongest assets and with the children living with parents for an extended period. >> you're going to keep that? >> very much try to keep that. adds cost, but it's very much something we're going to try to keep. >> two obamacare architects. ezekiel emanuel and johnathan gruber, professor of economics at mit. thank you for both for being here. >> thank you. >> you heard what donald trump had to say. i've been talking to my sources who have said that the president was surprised by the fact that he had to explain a lot to president-elect trump about how all of this would work. obamacare is intricate and