Britains Prime Minister Keir Starmer announced Monday that he will resign following a mounting revolt inside the Labour Party after devastating local election losses, the resignation of government ministers and growing pressure from senior members of his own cabinet.Starmer said he would step down as prime minister and Labour leader after concluding he could no longer unite the party, but is expected to remain in office until a successor is chosen.The resignation follows weeks of turmoil inside Britains ruling party after Labour lost roughly 1,500 council seats and control of more than 25 councils in local elections last month, according to reporting from U.K. outlets. The losses were fueled by major gains from Nigel Farages Reform UK party in Labours traditional strongholds and by Green Party advances in urban areas.FARAGE'S REFORM UK BEATS OUT ESTABLISHMENT PARTIES IN 'EARTHQUAKE' ELECTIONSStarmers domestic troubles deepened after a damaging dispute with President Donald Trump over the Iran conflict earlier this year. The British prime minister initially resisted U.S. requests to use British bases during military operations against Iran, prompting Trump to criticize him publicly, saying: "This is not Winston Churchill that were dealing with," on March 3.But after initially drawing a hard line, Starmer later approved limited defensive cooperation with the U.S., angering anti-war lawmakers inside his own party while still failing to satisfy critics who accused him of indecision and weak leadership.Public frustration over the episode surfaced in YouGov focus groups and polling commentary, where voters described Starmer as "weak," "indecisive" and overly reactive to Washington.AS EPSTEIN-LINKED APPOINTMENT SPARKS BACKLASH, UK PM STARMER FACES PARTY REVOLT AMID RESIGNATION CALLSThe crisis escalated days after the local election results after two Labour ministers resigned publicly and called for a leadership transition.Jess Phillips resigned from her government role after Starmer reportedly refused to step aside during a cabinet meeting. Phillips said Labour needed leadership with more "gusto" and warned the government was failing to deliver the change voters expected, according to The Guardian.Miatta Fahnbulleh also resigned and called for what she described as an "orderly transition," according to U.K. media reports Tuesday.More than 80 Labour MPs publicly called for Starmer to resign, Steven Swinford, political editor at The Times, wrote on X, "What is striking is the fact that they hail from all wings of the party," adding that roughly a third were centrists, while others came from Labours soft-left and hard-left factions.Senior cabinet ministers were also reportedly pressuring Starmer privately to establish a timetable for his departure. Senior Labour figures, including Yvette Cooper and Ed Miliband, had urged Starmer to consider stepping aside to avoid further political damage, The Guardian reported.John Healey defended Starmer publicly before the resignation announcement, saying, "More instability is not in Britains interest. Our full focus must be on security."UK TO RELEASE FILES RELATED TO FORMER AMBASSADOR'S JEFFREY EPSTEIN TIESThe political crisis also intensified scrutiny over Starmers broader leadership and decision-making.His government faced criticism over Britains handling of the ongoing U.S.-Iran crisis, with opponents accusing him of appearing indecisive after reports that the U.K. initially resisted some American military requests before partially backtracking. Public frustration over the issue has surfaced in recent polling and voter focus groups published by YouGov.Starmer also faced criticism over his appointment of Peter Mandelson as ambassador to Washington, reviving media scrutiny surrounding Mandelsons past association with convicted sex offender Jeffrey Epstein.Attention now turns to a potentially divisive Labour leadership contest.Wes Streeting is viewed as a leading contender from the partys centrist wing, while Andy Burnham remains popular among Labours grassroots having recently won a seat in Parliament. Deputy Prime Minister Angela Rayner is also expected to play a major role in shaping the succession battle.