[1][2] 101 MPs have served in the Official Opposition Cabinet at one point in the 43rd Parliament.

Under Andrew Scheer, most senior Shadow Ministers also had a deputy critic for their file.

It is led by Erin O'Toole, who was elected as party leader on August 24, 2020.

Scheer made changes to his Shadow Cabinet as a result of various members of his caucus announcing their candidacy for the party's leadership.

Under caucus rules, MPs running for party leadership had to resign their critic positions.