In 2020, Mark Arabo was also a member of the National Finance Committee for the Biden for President campaign, having raised over $100,000 for the Joe Biden campaign. He also endorsed Biden in early summer 2019 when he hosted him at his house. Arabo was also among the list of invited attendees for the 2021 inauguration of Joe Biden, although he did not attend in person due to security measures implemented after the U.S. Capitol attack.