(Bloomberg View) —  Democrats relish the Republicans' inability to pass even a pathetic alternative to Obamacare.

For seven and a half years, Republicans have campaigned and voted to replace the Affordable Health Care Act. When given a real chance at success, with governing control, they were impeded by a president who's ignorant on the issue. Then, after Republican senators slipped behind closed doors to come up with their own plans, they provided products that voters, even some Trump supporters, overwhelmingly spotted as frauds.

As justified as the Democrats' ridicule is of this, it's also creating a trap for them: They overreach if they think they can now push for a single-payer, government-run system. Such a course threatens to be a problem in the 2018 midterm election cycle and certainly would be in 2020.