The Iowa caucuses have solidified Donald Trump and Bernie Sanders as two of the leading candidates in this cycle: Sanders is the democratic socialist channeling liberal disenchantment with the Goldman Sachs wing of the party, while Trump represents the frustration of Republican blue-collar, white, middle-class voters with global competition and immigration. Both of them are leading a revolt against their respective party elites. The similarities don't end there. You might think the two candidates have wildly different views on the signature domestic issue of the last six years: health care reform. But you'd be wrong. Sanders' plan, to the extent...