Conservative MP becomes seventh to leave Poilievre’s caucus over the past year

Conservative MP Larry Brock speaks on Parliament Hill in Ottawa, Monday, June 15, 2026. THE CANADIAN PRESS/Adrian Wyld

OTTAWA — Conservative Larry Brock says he has resigned from the House of Commons, ending five years as the MP for Brantford-Brant South.

Brock announced his plans to step down last month, saying he planned to return to the office of the Crown prosecutor.

A byelection will be called in the Ontario riding, along with others that are currently vacant, in the coming months.

• Conservative MPs worried about losing their seats privately question Poilievre’s leadership, ability to defeat PM Carney

Conservative Leader Pierre Poilievre is planning to hold a rally in Brantford on the weekend.

Brock is the seventh MP to leave Poilievre’s caucus over the past year.

Four members defected to the Liberal government and Richard Martel joined the Senate this summer, while Brock and his caucus colleague Cathay Wagantall both left politics.

This report by The Canadian Press was first published Sept. 18, 2026