McMahon's most significant recent act was voting against the Assisted Dying Bill at Third Reading in June 2025 — one of five rebel votes he cast that day. He backed amendments that would have barred people from qualifying if their wish to die was driven by not wanting to be a burden, a mental disorder, a disability, or financial hardship, and opposed a requirement to assess palliative care provision in the annual review. His votes place him firmly among the bill's sceptics, and he sits 45 percentage points below his party's average on assisted dying access.
Beyond that rebellion, McMahon is a 97.8% party-line voter with an 80% participation rate — broadly in line with Commons averages. His speeches cluster heavily around local government (67 contributions), the economy and jobs, fiscal policy, and housing. He votes consistently for progressive taxation (100% alignment) and worker rights (85%), and against tax increases (0% alignment with that position). He scores low on pro-business and pro-parliamentary-scrutiny dimensions, both at 12%, and is notably resistant to Lords amendments — just 4% alignment on that measure.
McMahon serves as Minister of State for Local Government, which explains both his speech pattern and his ministerial interventions in the news. He led a council tax administration consultation in April 2026, and local coverage credits him with lobbying successfully over Royton town centre safety barriers. He has also raised knife crime and policing capacity in Oldham through parliamentary debate and direct meetings with officials. He holds no select committee seat, consistent with his ministerial role. Most recent local coverage is neutral in tone; the stronger positive sentiment comes specifically from local government stories.