One-sided taping without consent is illegal in many places.
He will probably face criminal prosecution and civil suits.
Nope. He’s good in DC. It’s a one party consent area:
https://www.rcfp.org/reporters-recording-guide/state-state-guide/district-columbia
One party consent audio recording is legal in many places. It’s trivial to look up. One sided consent is all that is needed in the District of Columbia, where the events in question largely took place.
https://www.mwl-law.com/wp-content/uploads/2013/03/LAWS-ON-RECORDING-CONVERSATIONS-CHART.pdf
https://en.wikipedia.org/wiki/Telephone_recording_laws#One-party_consent_states
I am fairly certain Wolff gave himself consent to record, if such recordings do actually exist.