In the 2006 federal election, MacKenzie was re-elected to his Oxford seat, beating Liberal candidate Greig Mordue by a wide margin.
With the Conservative Party of Canada forming a minority government, MacKenzie was selected as parliamentary secretary for the Ministry of Public Safety.
Mackenzie believes that Andrew Scheer violated House of Commons rules by parliamentary resources to record the endorsement video for Khanna.
[3] Tait lost to Khanna, and MacKenzie is backing David Hilderley, who is running for the Liberal Nomination, by arguing that the Conservative Party operates differently from Stephen Harper or Peter Mackay.
[5] Citing concerns with the Conservative nomination process, MacKenzie endorsed Liberal candidate David Hilderley.