[2] He first campaigned for the Manitoba legislature in the 1896 provincial election, and lost to Liberal incumbent David McNaught by fifty-four votes in the Saskatchewan constituency.
He ran again for Saskatchewan in the 1899 election, and defeated Liberal candidate John Henry McConnell[3] by fifteen votes.
The Conservatives won this election, and Ferguson served in the legislature as a backbench supporter of premiers Hugh John Macdonald and Rodmond Roblin.
Redistribution forced Ferguson into the Hamiota constituency for the 1903 election, and he lost to Liberal David Jackson[2] by twenty-two votes.
[2] His biographical entry in the Canadian Parliamentary Guide indicates that he was popular with both sides of the house.