McLeod won the
Wairarapa electorate in the
1919 general election in a triangular contest, defeating the incumbent,
J. T. Marryat Hornsby of the
Liberal Party. He worked closely with Prime Minister
William Massey while the latter was ill with cancer and was added to the cabinet as Minister of Lands in 1924. When Massey died in 1925 McLeod was one of several candidates named as a possible candidate to succeed Massey as party leader. During the caucus meeting which conducted the
leadership ballot McLeod, having realised he had no realistic chance of winning, withdrew as a candidate. Ultimately
Gordon Coates replaced Massey as leader. In a reshuffle in 1926 Coates additionally appointed McLeod as
Minister of Industries and Commerce. McLeod promoted closer settlement of land and during his tenure in the lands portfolio there was a steady increase in the acreage of cultivated land. Critics of his thought the pace could have been increased. He also allotted public land to help with resettlement of
World War I veterans. Part of the agreement was that all sitting members who support the coalition would in turn receive the official endorsement as coalition candidate. This pragmatic decision caused trouble in those electorates where the voters were not satisfied with the incumbent's performance, for example in the Wairarapa and electorates. Local electorate committees were not supportive of McDonald and supported McLeod instead. Consequently, McLeod stood as a Coalition Independent or Independent Reform candidate in 1931 and won the election with a 7% margin of the votes. McLeod was a supporter of the coalition in the house. Back in parliament he was critical of the creation of the new "anti-socialist"
Democrat Party in 1934. He was particularly critical of the presence of big donor money being behind the party. He made a speech in parliament about it and, under
parliamentary privilege, named wealthy businessman
William Goodfellow as being the funder of the party. In 1935, McLeod was awarded the
King George V Silver Jubilee Medal. He retired from politics in
1935. ==Later life==