LONDON (Reuters) – Several hopefuls vying to replace British Prime Minister Theresa May turned their fire on favorite Boris Johnson on Sunday, questioning his pledge to leave the European Union by the end of October no matter what. Boris Johnson, leadership candidate for Britain’s Conservative Prime Minister, leaves home in London, Britain, June 15, 2019. REUTERS/Toby MelvilleWith former London mayor and foreign minister Johnson keeping a low profile, the other candidates have targeted the air waves to present their cases to lead the governing Conservative Party. But the question always returns to “Boris”. At a Channel 4 debate, his absence was marked by an empty lecturn. That left five other candidates to argue over which was best placed to deliver Brexit in testy exchanges International Development Minister Rory Stewart termed a competition of “machismo”. But Johnson, who unlike many politicians is better known by his first name, was often mentioned and his relative silence has so far done little to dent his popularity. He secured a large lead in the first round of voting by Conservative lawmakers and his team hopes for an increased share this week in the second. However, candidate-after-candidate on Sunday questioned his ability to navigate Britain’s departure from the EU, saying his pledge to leave on Oct. 31 was nigh on impossible and would set Britain on track for a no-deal Brexit. “The difference between me and Boris is that I would try for a deal,” said Foreign Minister Jeremy Hunt, who is second place in the leadership contest. “I am not going to create a set of circumstances that makes it all but impossible to get a deal because I think we should be offering the country some better choices,” he told the BBC. One of Hunt’s supporters, Work and Pensions Minister Amber Rudd, went further, making a thinly veiled criticism of what she described as some candidates’ “do or die approach” to Brexit without considering potential job losses. BREXIT FELLS TWO PM’S Almost three years since Britain voted to leave the EU, the country, parliament and both main parties are still deeply divided over how, when and even whether Brexit should happen. Brexit has claimed two prime ministers. David Cameron resigned shortly after a 2016 referendum, and now May is making way for a successor because of her failure to get a deal she agreed with the EU through parliament. Brexit is dominating the Conservative leadership race, with many of the candidates, albeit some of them reluctantly, saying they would lead the nation out without a deal. Slideshow (2 Images)Rory Stewart, who wants to rule out a no-deal Brexit, took issue with Johnson’s argument that the only way to get an improved deal from the EU was to prepare for leaving without an agreement and using that as leverage. “They are not scared of it because it is not a credible threat. The European Union knows no deal cannot get through parliament,” he told the BBC. “How is Boris going to deliver Brexit, how? … I don’t even know what he believes. He won’t talk to me, he won’t talk to you, he won’t talk to the public. We want to know what he believes,” said the minister. Reporting by Elizabeth Piper; Editing by Raissa Kasolowsky and Andrew CawthorneOur Standards:The Thomson Reuters Trust Principles.