US health care is far more expensive than anyone else in the world, and has been for a long time, well before Obama. Now that Trump has cut subsidies it will just become less affordable to more people. To suggest Trump is trying to find more affordable healthcare is a preposterous assertion. Trump knows almost literally nothing about healthcare and does not give a damn about its affordability. Nor has he authored any legislation to date. Nor is he capable of doing so. He is incapable of reading, much less understanding complex mechanisms, programs or policies.
Nor is he much interested in democratic values, btw.