SEATTLE — I’m 35 years old. I didn’t go to college after high school. Instead I got a job in insurance, and I’ve spent half my life on the business side of keeping people healthy. Only once have I felt that the industry took positive steps toward insuring America, and that was when Obamacare mandated it. I assumed Donald Trump’s presidency would doom the law. A Republican replacement, which could cut off insurance for millions of people, may pass the Senate as soon as next week. And I fear...