At this stage of the war, Churchill's position as Prime Minister was still precarious. Chamberlain remained the leader of the Conservative Party which had a massive Commons majority and Halifax was, almost certainly, the preferred establishment choice to be Chamberlain's successor. Churchill could not, therefore, afford to have both Chamberlain and Halifax aligned against him. Given that the other two members of the war cabinet were long-time political opponents from the Labour Party, Churchill was by no means certain of an adequate majority within his own cabinet. Attlee became a more or less silent supporter who listened rather than spoke, but Greenwood asserted himself resolutely as a supporter of Churchill's fight on policy.