British Labour Party leader Jeremy Corbyn lost a vote of no-confidence Tuesday after a motion was put forward by his party’s lawmakers angered by his leadership. Some 172 Labour MPs voted for the motion and 40 voted against, while four abstained. The vote is nonbinding, and Corbyn said he would not “betray” the party members who elected him leader by standing down. “Today’s vote by MPs has no constitutional legitimacy,” he said. More than 50 members of his frontbench team have resigned since the Brexit referendum results were announced Friday; Corbyn has faced calls for his resignation over his alleged absence of leadership during the vote to exit the European Union. Two additional Labour MPs resigned Tuesday after the vote of no-confidence. If Corbyn refuses to step down, Labour rebels are expected to begin a formal process that would trigger a new leadership election. Corbyn might need 50 nominations from MPs and MEPs in order to secure his place on a ballot that would be sent to Labour Party members.