LONDON (Reuters) – A member of the Conservative Party committee that governs its backbench lawmakers told Reuters on Wednesday that Boris Johnson’s tenure as British Prime Minister looks to be over, adding that more senior ministers should move against him. The member of the executive member of the 1922 committee said that though it would meet on Wednesday afternoon to discuss getting a mandate to bring another vote of confidence against the prime minister, it would be better for senior ministers to oust him. “The game is up. It’s cabinet that needs to move against him,” the committee member t…