[1][2] He contested the 2007 general election for the governing National Alliance, and faced a difficult race against independent candidate and former Air Niugini chairman Sir Joe Tauvasa and incumbent Governor Clement Nakmai.
He trailed Tauvasa on primary votes, but won the seat after the final distribution of preferences.
[3] The result enraged some of Tauvasa's supporters, who responded with two days of rioting in the Hoskins area.
[4] Humphreys has stated an intention to increase accountability and transparency in the provincial government and to improve basic services in previously neglected areas of the province.
[5] In January 2012, he joined Don Polye's new Triumph Heritage Empowerment Rural Party.