Minister for Small Business and Tourism

On November 4, 2015, Chagger was sworn in as Minister of Small Business and Tourism.^[10]

As a result of the July 18, 2018 cabinet shuffle, Chagger's responsibilities for Small Business were given to Mary Ng, and Mélanie Joly took on the responsibilities of Tourism.^[11] She was later appointed to the role of Minister of Diversity and Inclusion and Youth, which she held until 2021.^[12]

Leader of the Government in the House of Commons

On August 19, 2016, Chagger was sworn in as Leader of the Government in the House of Commons replacing Dominic Leblanc in the position. She retained her responsibilities as Minister of Small Business and Tourism until the July 18, 2018 cabinet shuffle.^[3]

On March 10, 2017, Chagger in her role as Government House Leader released a discussion paper titled Modernization of the Standing Orders of the House of Commons^[13] which sought to implement different ways that House of Commons procedure and practice could be improved to be more accountable, predictable and available to all Members of Parliament, and the public. The modernization paper suggested reforms to the House of Commons such as the implementation of electronic voting, the curtailment of Friday sittings, the reformation of Question Period, including a Prime Minister's Question Period, changes to the process of prorogation, greater powers for the Speaker to separate votes and committee studies on omnibus bills and legislative programming.

Opposition members of Parliament were concerned with the reforms proposed in the discussion paper, in particular with proposals to implement legislative programming and the elimination or change of Friday sittings in the House of Commons. In late April 2017, Chagger sent a letter to her counterparts, then New Democratic Party House Leader Murray Rankin and Conservative House Leader Candice Bergen, to inform them that the government would be abandoning several of the key proposals that were part of the modernization paper, such as changes to the Friday sitting, legislative programming, and electronic voting.^[14] They would continue however with proposals that were explicitly part of the 2015 Liberal election platform, including the decision to have a Prime Minister's Question Period, requiring the government to issue a report following the use of prorogation, and allowing the speaker of the House of Commons to separate votes or committee studies on different parts of a bill that he or she deems to be omnibus.^[15]

WE Charity Ethics Investigation

In July 2020, Chagger was the first witness who testified in front of a parliamentary committee investigating awarding of a sole-sourced contract to run Canada Student Service Grant (CSSG) to WE Charity, an organization with ties to Prime Minister Justin Trudeau and Finance Minister Bill Morneau. Chagger was the one who signed the contracts with WE Charity, and had met with WE Charity days before student program was announced by Trudeau.^[16][17] Originally it was reported that WE charity would get a payment of at least $19.5 million, later it was disclosed that the contract was paying them up to $43.5 million to run student volunteer grant program. Chagger testified that it was the public service that recommended the grant program be outsourced to a third party via a contribution agreement, specifically it was Assistant Deputy Minister of Employment and Social Development Rachel Wernick.^[18]

Removal from Cabinet

The Prime Minister removed Chagger from Cabinet in 2021, less than two years after holding the role of Government House Leader, one of the most prominent Cabinet roles.^[6] Chagger declined to speculate why she was removed entirely from Cabinet.^[19] She has remained a backbench Member of Parliament since, and the Prime Minister has declined to return her to Cabinet.^[20]