Canadian Prime Minister Justin Trudeau announced a sweeping reshuffling of his Cabinet, the largest overhaul of his government to date.

Trudeau fired three prominent Cabinet ministers and seemed to restructure the portfolios of some of the other positions. For example, the housing ministry and the infrastructure and communities will now be led by the same Cabinet minister.

Only seven members of the Cabinet will keep their roles from before the reshuffle, including Deputy Prime Minister Chrystia Freeland and Foreign Minister Mélanie Joly, according to a statement from Trudeau’s office.

Liberal Party leader Trudeau didn’t directly say why he reshuffled the positions and fired ministers, but the move comes as polling suggests his rival Conservatives’ ascendancy on key issues.