Grewal left the federal Liberal caucus in 2018 after his gambling problem came to light, and he chose not to run for re-election in the Ontario riding of Brampton East the following year.
Alberta's former deputy premier entered the province's NDP leadership on Sunday with criticism of the federal carbon levy and Prime Minister Justin Trudeau.
The federal government is considering advertising the benefits of the carbon price rebate in the latest sign Prime Minister Justin Trudeau is planning to defend the policy tooth and nail against Conservative attacks.
The House of Commons passed legislation on Tuesday to implement an update to Canada's free trade agreement with Ukraine that its president signed during a visit to Ottawa last year.
Provincial leaders were frantic about the ailing state of their health care systems last year when Prime Minister Justin Trudeau sat them down and offered $46.2-billion worth of urgent treatment.
Prime Minister Justin Trudeau joined a chorus of well-wishers from Canada and around the world on Monday in wishing King Charles a speedy recovery after Buckingham Palace revealed the monarch has been diagnosed with cancer.
The national chief of the Assembly of First Nations Cindy Woodhouse is trying to make inroads with Conservative Leader Pierre Poilievre, hoping to forestall the tensions and angst that marked the party's last time in power.
On Wednesday, Greenpeace Canada inflated a giant owl on the Rideau Hall grounds near Prime Minister Justin Trudeau’s residence to demand movement on a promised nature protection law.