In the opening scene of the new documentary Steal This Story, Please! reporter Amy Goodman chases down a senior Trump administration adviser.

The camera follows as she weaves through a convention hall at a climate conference in Poland, shouting questions at energy expert P. Wells Griffith III right up until he shuts a door in her face. Undaunted, she waits outside. The door opens a crack. It’s some lackey, peeping out and shooing her away; right up until the door closes again, Goodman persists, trying to make contact. She’s out of breath when she finally turns back.

Goodman, the indefatigable longtime host and cofounder of the independent journalism stalwart Democracy Now!, has spent the past 30 years asking her subjects tough questions, leading people like former US president Bill Clinton to describe her as “hostile and combative” and intimidating government officials so much that they flee on sight.

Steal This Story, Please! traces Democracy Now!’s rise from an upstart airing on a few handfuls of public radio stations to … the exact same thing, just distributed on thousands of radio and television stations as well as the internet.

Democracy Now! is a rare media success story where an outlet has flourished by sticking to its original vision—it has always been a proudly grassroots endeavor that shuns corporate sponsorship and embraces coverage of social movements. It has also always been led by Goodman, 68, whose ascent to progressive icon is documented in parallel to the outlet’s growth.

Steal This Story, Please!, directed by Oscar-nominated filmmakers Tia Lessin and Carl Deal and in theaters Friday, casts an affectionate eye on its subject—this is no searing exposé—but it still thrusts Goodman into an unfamiliar position, where she’s the person answering questions rather than asking them. “It’s painful,” Goodman tells WIRED. “A taste of my own medicine.”

She was more than happy to deal with the discomfort, though, as she sees the project as a way to spread the word about the necessity of independent journalism. She sees the documentary’s name as a ...