“The question is not whether he’s vengeful,” conservative columnist Ben Shapiro told me. “The question is how willing he is to use the levers of government to exact that revenge.”

This is no idle question for Shapiro. The California-based commentator emerged in 2016 as one of Trump’s most vociferous—and most frequently targeted—critics in the conservative movement. He spent months relentlessly prosecuting the candidate on TV and Twitter, and in March set off a media frenzy when he abruptly quit his job at Breitbart and blasted the company’s then-CEO Steve Bannon for being a “bully” who had turned the site into “Trump’s personal Pravda.”

Now that Trump and Bannon are both in the White House, Shapiro says he has no intention of trying to make amends—but can’t help but worry about his standing with them. “Trump has an extremely long shit list…I don’t want to flatter myself and say I’m top 10, but I’m certainly top 50,” he told me. “I’ve been half-joking for almost a year that my IRS audit is already being drawn up.”

In fact, he’s taking the threat of retaliation from Trump and his allies quite seriously. A favorite target of the alt-right troll army that Breitbart helps marshal, Shapiro told me he’s already purchased a shotgun and installed a high-end security system in his home. When we spoke the night before the inauguration, he was deliberating over whether to delete his entire personal email archive before spies or Russian hackers could infiltrate his inbox.