Joe Biden’s presidential campaign is taking issue with The New York Times‘ coverage of work by the candidate’s son, Hunter Biden, for a Ukrainian company that’s part of House Democrats’ impeachment inquiry against President Trump.

At issue is a Wednesday piece by author Peter Schweizer, “What Hunter Biden Did Was Legal — And That’s the Problem,” which raised questions over the role of Hunter Biden, in Burisma Holdings, a natural gas company from which he once drew at $50,000 monthly salary.