Oral arguments in Fisher v. United States focused on whether 18 U.S.C. §1512(c)(2) is limited to acts that impair evidence or instead operates as a broad catchall for other ways of obstructing official proceedings, including the January 6 charges. Petitioner's counsel argued for an evidence-focused reading; the government urged a plain-language, broader reading and said nexus and a stringent "corruptly" mens rea constrain prosecutions.