Right-wing attorney John Pierce’s fiery pro-Trump and anti-establishment persona, and his reputation for backing causes championed by conservatives, has helped him amass nearly two dozen clients charged in the Jan. 6 attack on the U.S. Capitol. But as his client list grows, so too are concerns about potential conflicts of interest in his cases.

Judges in at least two multi-defendant cases have appointed a conflicts counsel in recent weeks to examine whether Pierce’s representation of multiple co-defendants charged together for allegedly breaching the Capitol presents ethical issues that may require Pierce to withdraw. Pierce is representing at least 22 people charged in the Capitol riot, according to a review of court documents, the most of any defense attorney.