In mid-November, I was on my way to cover an event at a law firm’s Pennsylvania Avenue offices in Washington, when my Uber got stuck in major traffic.

But this wasn’t the ordinary traffic D.C.-area residents have gotten used to since the Washington Metropolitan Area Transit Authority began its misadventures in track repair back in June. This particular traffic jam was caused by hundreds of high school students who walked out of their classes on that beautiful Tuesday morning one week after the election and marched their way to Pennsylvania Avenue to Donald Trump’s new luxury hotel to protest the divisive campaign run by the president-elect.

Their loud chants were distracting and made it difficult to cover the event right across the street. But I wasn’t at all bothered. In fact, I was heartened by the peaceful protest organized and implemented by the multiethnic group of students, who are too young to vote — and too often described as apathetic, but clearly not on this sunny day — propelled to action by what they believe to be an unjust election outcome that will likely have a significant impact on their futures.

Mr. Trump was nowhere to be found on that day, reportedly holed up in his New York City apartment putting together his transition team. But I hope he got wind of these young voices and heeds their call to heal the wounds he helped inflict on the country.

He’s given mixed messages to date about his intentions on the diversity front. He campaigned on a mostly conservative Republican platform, but he called same-sex marriage “settled” law while also saying he planned to deport 2 million to 3 million illegal immigrants he thinks are criminals.

The president-elect has also sent mixed messages on his plans for President Barack Obama’s health care reform law. During the campaign, Mr. Trump repeatedly vowed to repeal the Affordable Care Act, but in that same post-election interview he expressed openness to keeping certain popular provisions such as the ban on denying insurance coverage to individuals with pre-existing conditions and the ability to maintain coverage for dependents up to age 26.

What he didn’t say, and perhaps doesn’t yet understand, is that any attempt to repeal parts of the law would throw the entire program into an unfixable disarray.

It’s hard to predict what the president-elect will do, and that’s problematic for the country, for the kids and for employers. While Mr. Trump campaigned on a typically Republican platform, he is far from being a typical Republican. He may repeal the health care law, and he may drastically cut back on what he sees as unnecessary federal regulations. Or he may listen to the more progressive voices in the business community and back away from conservative campaign pledges such as a vow to withdraw the United States from the Paris climate agreement aimed at reducing global carbon emissions.

We just don’t know, and that’s the problem. But there’s one cue he can take from the similarly divisive 2020 presidential hopeful Kanye West: Listen to the kids, bro!