He stated that one of his priorities was to hold LePage accountable for his behavior, and by joining the majority party in the Maine House of Representatives, Chipman would be in a better position to accomplish that goal.
He was one of three members of the Maine House who requested an investigation of LePage for using $530,000 of taxpayer funds to pressure a private school into firing their new president, a political rival of the Governor.
The state's Government Oversight Committee unanimously voted to launch the investigation, and Chipman led an effort to impeach LePage.
[10] After a contentious Democratic primary in 2016,[11][12], Chipman won 53% of the vote in the Maine Senate District 27 three-way general election, and he was re-elected in 2018, 2020 and finally 2022.
[13] In June 2024, a day prior to the primary election, Chipman withdrew from a bid to return to the Maine House of Representatives in District 118.