It has been clear for some time that Republicans need just two things in order to repeal Obamacare—a winning alternative and political willpower. The jury is still out on how much of the latter the party possesses. But when it comes to uniting around a well-conceived alternative that can pave the way to full repeal, the news is increasingly good. Jeb Bush’s just-released Obamacare alternative is the latest example of this encouraging trend.