Marty Flynn

In January 2012, Flynn announced his candidacy for the Democratic Party's primary election for the 113th legislative district in the Pennsylvania House of Representatives, challenging incumbent Representative Kevin P. Murphy.[11] After a complaint was filed with the United States Office of Special Counsel alleging that Flynn's candidacy and government employment constituted a violation of the Hatch Act, an attorney from the office informed Flynn that he was in violation and needed to choose between his job and his candidacy. Flynn resigned his position with the Lackawanna County Prison and continued his candidacy.[13] In the April primary election, Flynn defeated Murphy with 4,306 votes to 4,065 (51.4% to 48.6%).[14] He was not opposed by a Republican Party candidate in the November general election.[15] Flynn was sworn into office on January 1, 2013.[16] He was assigned to the House Aging and Older Adult Services, Commerce, and State Government committees.[17]

Flynn faced a primary challenge in 2014 from Scranton truck driver Lee Morgan.[18] Flynn defeated Morgan with 80% of the vote in May 2014[19] and won a second term in November 2014 with 75% of the vote against Republican Marcel Lisi.[20] Flynn co-sponsored a bill to legalize industrial hemp in 2015.[21][22] He won a third term in 2016 against Republican David Burgerhoff with 69% of the vote (18,561 versus 8,223).[23] Flynn was reelected without opposition when he ran for his fourth term in 2018. He defeated Republican William Kresge in the 2020 election, receiving 68.1% of votes cast.[24]

Flynn served on the Regional Recovery Task Force of Lackawanna County during the COVID-19 pandemic. On May 9, 2020, Flynn posted retort against business owners who were criticizing Pennsylvania Democrats for their handling of the pandemic on his personal Facebook page, stating "Keep talking about how bad we Democrats are and WE will STOP supporting YOUR businesses. You want to make it PERSONAL and we WILL".[25] After being criticized for his post, Flynn removed and apologized for the "juvenile" post and for taking the criticism personally.[26]

Flynn in 2021

On February 14, 2021, Democratic State Senator John Blake announced he would be resigning as Senator of the 22nd senatorial district to take a position in the office of U.S. Representative Matt Cartwright. Flynn and Representative Kyle Mullins of the 112th district both sought the Democratic nomination in the special election to succeed Blake.[27] On March 13, Democrats held a special convention where members of the local Democratic Party committees selected a nominee. Flynn won the party's nomination by a vote of 206 to 118.[28] In the special election, held on May 18, Flynn received 51.2% of the vote, defeating Republican Chris Chermak, a county commissioner in Lackawanna County, who received 38.5%, while Marlene Sebastianelli of the Green Party received 9.2% of the vote and Nathan Covington of the Libertarian Party received 1.1%.[29]

Flynn was sworn in to the Senate on June 9.[30] He was succeeded in the state house by Thom Welby, his former chief of staff. In the state senate, Flynn is the minority chair of the finance committee, and serves on the appropriations, Community, Economic and Recreational Development, and Transportation committees.[31] Following a report that the Pennsylvania Turnpike Commission failed to collect $104 million in unpaid tolls in 2020,[32] Flynn, who serves as the ranking Democrat on the Senate Transportation Committee, filed legislation to reform their method of toll collection in January 2022.[33] In February 2022, Flynn filed legislation that would allow judges to compel people convicted of driving under the influence of having to pay child support for a child if their parent was killed by the drunk driver.[34]