Kerr became involved in local politics for the
Labor, and in 1893 he was elected to represent the
electoral district of Barcoo in the
Legislative Assembly of Queensland and served in that post until 1909. He rose to senior positions within the party, culminating in his election as leader of the Queensland Parliamentary Labor Party in 1904 after the death of his predecessor
William Browne. Kerr's leadership was complicated by a split in the party in 1905 in which he and other senior Labor figures opted to form a coalition with the Liberal Party to achieve statewide reforms. Although initially he commanded the confidence of the party, a state conference of the party in 1907 rejected Kerr's leadership and the Liberal-Labor coalition, opting to go into the 1907 state election alone. Kerr continued in parliament as an independent Labor member but was challenged by official Labor candidates until his defeat in his seat in 1909. == Later life ==