The way Canadians cast their ballots in the next federal election is still up in the air as the Liberal government weighs the pros and cons of keeping - or abandoning - a major campaign promise.

A report on the federal government's online electoral reform survey says two-thirds of Canadians who responded are happy with how the current voting system works.

Justin Trudeau's newly minted minister for democratic institutions is refusing to repeat the prime minister's campaign promise that the 2015 election would be the last conducted under the first-past-the-post voting system.