i think the obamacare worked. >> we all owe a huge debt to president trump who fundamentally transformed health care in america. >> what i favor is something that what barack obama wanted to do from the very beginning, and that is a public option. >> i want to give credit first to barack obama for really bringing us this far. >> of course, we owe a debt of gratitude to president barack obama. >> i'm fulfilling the legacy of barack obama, and you're not. >> i stand with barack obama all eight years, good, bad and indifferent. that's where i stand. >> let's go right to msnbc road warrior garrett haake who is live in houston for us, probably on no sleep. big night, garrett. all of the top polling candidates on stage for the first time. what stood out to you? >> reporter: hey, chris. you did have the three front-runners largely turning in strong performances, well-received performances. joe biden not afraid to mix it up with the other candidates.