(CNN) The Trump Organization has hired a former White House lawyer to assist with congressional inquiries into President Donald Trump's business interests.

Stefan Passantino, the former White House deputy counsel who was responsible for overseeing compliance with ethics and conflict-of-interest rules, will handle its responses to Democratic investigations, Passantino informed Congress in a letter sent to the House Oversight Committee on Friday and obtained by CNN.

Passantino left the White House last year to join Michael Best & Friedrich, a Milwaukee-based firm headed by former White House chief of staff Reince Priebus

Passantino will work closely with the Trump Organization's chief general counsel Alan Garten and chief compliance counsel George Sorial, according to sources familiar with the arrangement.

Passantino plans to recuse himself from issues he worked on while in the White House, according to one of the sources.

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