The Manitoba Liberal Party won a majority government in this election, and Armstrong sat with the small opposition group.

He lost the riding of Selkirk to Liberal Party candidate John Alexander MacDonell by a single vote.

The Manitoba Conservative Party formed government in 1900, initially under Hugh John Macdonald and subsequently under Rodmond Roblin.

The Conservatives again won a majority government, and Armstrong returned to the legislature after winning a deferred election in the northern constituency of Grand Rapids.

In 1915, the Roblin ministry was forced to resign from office after a report commissioned by the Lieutenant Governor found the government guilty of corruption in the tendering of contracts for new legislative buildings.