Commentary: How to make candidates show their taxes

Since 2016, the Trump resistance has suggested a number of ways to keep another Donald Trump from winning a presidential election.

Former Labor Secretary Robert Reich, for example, argues that Democrats should embrace stronger populist economic policies to inoculate the public against Trump's appeal to unhappy working-class voters. Tennessee Democratic Rep. Steve Cohen takes another tack; he has introduced more than one bill that would eliminate the electoral college, thereby preventing another candidate from winning the election while losing the popular vote.

These aren't bad ideas, but there's