It’d be very overt for them to trumpet the party of a man who is not in an elected office. If it’s an appointed office they’ll get around it by mentioning the party that appointed and/or the party in control of the legislature if they confirmed the appointment.
He works for the DOJ. If it were a republican I suspect the articles would be replete with the word. Watching news and reading newspapers is not a passive activity. If it is passive, you are likely being brainwashed. Challenge authority.