US President Donald Trump on Sunday claimed that British Prime Minister Keir Starmer would resign, blaming his troubles on what he described as failures in immigration and energy policy.In a post on Truth Social, Trump said Starmer had "failed badly" on the two issues and renewed his call for increased North Sea oil production. The comments came as Starmer faces mounting pressure over his leadership, with the British leader considering his political future after rival Andy Burnham's decisive parliamentary election victory prompted more ministers and Labour lawmakers to call for him to step aside.According to Reuters, Starmer spent the weekend discussing his position with family and allies, while supporters of Burnham hoped for an orderly transfer of power.Also Read: UK PM Keir Starmer to decide Monday on stay or quit after Burnham winThe pressure has intensified following Labour's poor local election results and Burnham's strong showing in a parliamentary contest, fuelling speculation about a potential leadership challenge. Reuters reported, citing a source familiar with the matter, that the prime minister was spending the weekend discussing his future with family members and close allies and that an expected conversation with Burnham could help clarify the situation.The growing unrest within Labour follows months of declining popularity for Starmer, who led the party to a landslide general election victory in 2024 but has since struggled to maintain public support. Labour's poor performance in local elections earlier this year exposed the depth of dissatisfaction among voters and party members, while polls suggest Burnham would be well placed to win a formal leadership contest.Adding to the pressure, Sky News reported that Foreign Secretary Yvette Cooper had privately urged Starmer to step down. While her office did not comment, reports of senior ministers questioning Starmer's future have fuelled a sense within Westminster that the debate is increasingly focused on when, rather than whether, he leaves office.While, AP reported that Starmer spent the weekend at Chequers, the prime minister's country residence, with his family as speculation over his future intensified. Business Secretary Peter Kyle said Starmer was "making time to reflect on the political realities, challenges and opportunities that he finds himself in," though he dismissed reports of an imminent resignation as speculation.Discontent within Labour has been building for months as lawmakers seek ways to reverse the government's slide in popularity. AP reported that Starmer has faced criticism over his inability to deliver the economic growth he promised, improve strained public services and ease cost-of-living pressures. His government has also been weighed down by a series of political controversies, further eroding support among party members.Labour is also facing pressure from both sides of the political spectrum. The party has been losing progressive voters to the Green Party while contending with the rise of Nigel Farage's anti-immigration Reform UK, which has consistently performed strongly in opinion polls, according to AP.Burnham's victory has transformed the political landscape. The former mayor secured nearly 55% of the vote in Makerfield, finishing more than 9,000 votes ahead of Reform UK, AP reported. Now that he has returned to Parliament, Burnham is in a position to challenge Starmer for the Labour leadership.In his victory speech, Burnham signalled his ambitions, saying: "Everyone knows that politics isn't working. Everyone can feel that the country isn't where it should be. Tonight could, just could, be the turning point."Starmer publicly rejected suggestions that he would voluntarily step aside, saying on Friday that he would contest any leadership challenge. "I will run, I will stand," he said, according to AP.Nevertheless, prominent Labour figures have openly questioned whether he can continue. Charlie Falconer, a senior Labour member of the House of Lords, told the BBC that Starmer had "absolutely no authority" left and argued that an orderly transition between Starmer and Burnham should be arranged.If Burnham ultimately succeeds Starmer, he would become Britain's seventh prime minister in a decade, marking another chapter in a prolonged period of political upheaval in the United Kingdom.