You might not know Rachel Platten by name, but odds are you’ve spent some moments in a car ride, or on a late night dance floor, or in the shower, belting out the chorus to her multiplatinum hit.

"This is my fight song Take back my life song Prove I'm more than a song My power's strong enough I'm ready when I feel strong I'll put my fight song And I don't need to hear what nobody else believes ...

At the Democratic National Convention last month, Hillary Clinton walked offstage to her campaign anthem from 2016, “Fight Song” by Rachel Platten. It was meant, of course, as an uplifting moment. But ...