Prime Minister Keir Starmer sought to quell a mounting rebellion in his party on Monday by vowing to prove the doubters wrong and stay in power to avoid plunging ​Britain into a ‌new political crisis. A growing number of Labour lawmakers have turned on ⁠Starmer after his party suffered the worst local election results for a governing party in more than three decades last week, prompting a former junior ‌minister to threaten to seek a leadership contest if he fails to offer radical ⁠change.