The trap the Supreme Court set for Democrats’ best health care ideas

Sen. Brian Schatz (D-HI), Vox’s Sarah Kliff and Jeff Stein report, has a smart new plan to improve America’s health care system: allowing ordinary health insurance consumers to buy into Medicaid.

The proposal combines many of the beneficial aspects of former President Barack Obama’s original proposal for a public health plan — a government backstop for people who can’t find good insurance on the private market, a benchmark plan that can potentially driv...