How about repeal...period?!
But, since he favored Single Payer, what is he going to do now?
In fairness, that's old news from 15 to 25 years ago. In the last election Newt Gingrich and the Heritage Foundation got ripped for supporting "Obamacare" in the 90's. Ric Santorum also supported Obamacare in the 90s. If Newt can change, then Trump can change. Everybody can change and they perfectly entitled to. Trump has said he would change Obamacare to free market based system and open it across state lines.