Mario Dion
Mario Dion is a former Ethics Commissioner of Canada, known for overseeing the compliance of public officials with the Conflict of Interest Act and the Conflict of Interest Code for Members of Parliament. His tenure included notable investigations involving high-profile figures such as former Prime Minister Justin Trudeau, where he ruled on alleged breaches of ethics related to personal interests and public duties. Dion's work emphasized the importance of maintaining integrity in public office and highlighted the need for clearer regulations regarding conflicts of interest to protect democratic principles.
Not in the pool (under ¢1).
Recent news mentions
In 2019, Ms. Dawson’s successor, Mario Dion, found that Mr. Trudeau had broken the ethics law.
Pierre Poilievre’s casual accusation of an RCMP cover-up is stunning
Canada· 2025-10-20
Mario Dion recommended that the Trudeau government send its cabinet ministers and parliamentary secretaries for remedial lessons on the rules.
MIA: A real fix for Ottawa’s ethics rulesCanada· 2025-06-17
Then-Ethics Commissioner Mario Dion found Mr. Trudeau breached the law by accepting two all-expenses-paid family trips to the Aga Khan’s residence in the Bahamas.
Ethics rules must cover even apparent conflicts of interest, commissioner saysCanada· 2025-06-12