You couldn’t miss it. Arriving in Cleveland for the 2016 Republican National Convention, visitors found themselves staring at an enormous white billboard, slapped across the top of a tall concrete building in the city’s bustling downtown, screaming a simple directive: “DON’T BELIEVE THE LIBERAL MEDIA!”

The signage—black letters against a white backdrop, save for “LIBERAL MEDIA” in bloody red—was ample around town the week of Donald Trump’s coronation in Cleveland. It was carried on top of taxicabs; projected with lights onto a sleepy city building; and held on posters behind live cable news broadcasts throughout the week. The message paired splendidly with Trump’s remarks in accepting the GOP nomination. “Remember, all of the people telling you that you can’t have the country you want are the same people telling you that I wouldn’t be standing here tonight,” he said. “No longer can we rely on those elites in media and politics who will say anything to keep a rigged system in place.”

But the displays in downtown Cleveland weren’t paid for by Trump’s campaign, or the Republican National Committee, or an affiliated super PAC. They were a victory lap of sorts for conservative activist Brent Bozell and his advocacy group, the Media Research Center—one of the most active and best-funded, and yet least known, arms of the modern conservative movement. It was as if the billboard was announcing that the right’s decadeslong jihad against the mainstream press had reach its apogee in Trump, a candidate who made vicious rhetorical attacks on journalists a staple of his raucous campaign events, railed about the “crooked” and “lying media” in nearly every debate, and even went after individual reporters by name.