Republicans affirm Obama's success
When Barack Obama took office in 2009, the first African American president took on a lofty goal, to set the notion that all Americans ought to have affordable health care. Thus the Affordable Care Act was born and 25 mil. more Americans received coverage. It's not perfect. There are ongoing problems such as rising premiums and deductibles.
This was followed by years of demonizing of the ACA by Republicans which became nicknamed to Obamacare. They fought it tooth and nail throughout the process. Republican controlled states for no logical reason, even refused to expand medicare which would have given even more people coverage. The Republican controlled house voted over 60 times to repeal the ACA, and the Republican candidates for President all exclaimed that the first thing they would do was repeal the ACA.
In January 2017 President Trump took office, along with control of the House and the Senate. The Republicans could finally do what they had been pledging to to for so long, but they didn't do it. The Affordable Care Act is operating right now, almost a month into Trump's presidency. They know they can't do it because the American people have accepted idea that everyone should have affordable health care. They seem to have taken on the political charge of at least keeping the level of coverage and bringing down the costs. That is Obama's success.