We want elected leaders who think big. Today, two families control more wealth than half our population.

Working people are taking this historic 2016 election very seriously, and when we are inspired, there is no political force in America more powerful.

The wage gap, which Clinton vows to close, is rarely seen as a pressing economic problem, but rather as a “women’s issue,” the interest of a special-interest group. But if the wage gap is instead thought of as a disease infecting all corners of our economy, then calling for its cure is no small act. What to many sounds like empty campaign rhetoric is, in fact, radical.

On Monday night, the Democratic National Convention featured speeches from a string of labor leaders. They spoke for different constituencies — teachers, public sector workers, builders — but together they delivered their unifying message: Clinton, not Trump, is the best candidate for American workers.

As union officials convene at the Democratic National Convention in Philadelphia, the president of the largest umbrella labor group in the United States is bracing for a battle against a Republican nominee who is making a direct appeal to union members.

These are anxious times in America. Despite a steadily, if slowly, growing economy and the absence of a major war, people remain troubled by a sense of national underperformance and myriad social ills, most recently the surge in racially tinged fatal shootings committed by law enforcement officers and against them. A new Gallup poll reports that only 17 percent of Americans feel satisfied with the way things are going, the lowest percentage since October 2013—and down 12 points in just the past month.

While presumptive Republican nominee Donald Trump has tried to cast himself as the (white) workingman’s candidate, his vice presidential pick is anything but that. Indiana Governor Mike Pence is a prototypical Koch brothers Republican who has followed conservatives’ anti-worker, anti-union political playbook to a tee.

Working Pennsylvanians are hurting. Families haven’t fully recovered from the recession, and a majority of people are living paycheck to paycheck. For union households, this upcoming election is one of the most important in our lifetime. We will have a choice to select someone who will stand with us to fight for good jobs here in our country, support union workers, and oppose trade deals that shortchange Americans.

Mr. Trump refuses to release much of the documentation that would shed light on the business background he says qualifies him to lead the nation — including, most glaringly, his tax returns. So it has been up to members of the media to piece together the puzzle of the candidate’s business record. Post reporter Drew Harwell and the New York Times’ Russ Buettner and Charles V. Bagli are the latest to shine some light on that record.