Why was she a Trump supporter? Was she mostly disconnected from politics and voted for someone not named Hillary? Was she a single issue voter who felt like Trump was her last hope to save her guns, appoint conservative justices, or protect America from the brown horde? Did she get caught up in the whole, “we need a disruption in our government” wave that included both conservatives and liberals? Or what?
I think it was much simpler than that. She was 29 and her first job was working as a medical assistant in a private doctor's office. So she was 19-20 years old when Obamacare rolled out and got subjected to a constant stream of argument that it was ruining her boss' business and complaining from all her coworkers who were dealing with the new billing standards and codes.
I don't think she ever shook the idea that the ACA was bad after that. She didn't know much about the rest of politics, but had a strong opinion about that issue. Like I said, it's worth talking to people to figure out the story.