The ones that would lose their health insurance would not vote republican anyway. Ignore their opinion on this.
No matter what is done with Obamacare, someone is going to “lose coverage.” I am coming slowly to the conclusion that Mr. Trump is bargaining with the American people: I’ll go for all these fiscally conservative positions, and in return you’ll accept national health insurance/care. He has said he will not accept less than every person covered, and he said early on that he considered the Canadian system successful. If this is the case, the question is only whether the people consider the compromise worth it.