Conservatives, and Lib Dems on the centre-left, offering the latter a role in helping Labour's policy review at that time. Following the death of former Prime Minister and Conservative Leader Margaret Thatcher in 2013, Miliband spoke in a House of Commons sitting specially convened to pay tributes to her. He noted that, although he disagreed with a few of her policies, he respected "what her death means to the many, many people who admired her". He also said that Thatcher "broke the mould" in everything she had achieved in her life, and that she had had the ability to "overcome every obstacle in her path". He had previously praised Thatcher shortly before the Labour Party Conference in September 2012 for creating an "era of aspiration" in the 1980s. Miliband has previously spoken positively of his brother David, praising his record as Foreign Secretary, and saying that "his door was always open" following David's decision not to stand for the Shadow Cabinet in 2010. Upon David's announcement in 2013 that he would resign as a Labour MP and move to New York to head the International Rescue Committee, Miliband said that British politics would be "a poorer place" without him, and that he thought David "would once again make a contribution to British public life." When asked to choose the greatest British Prime Minister, Miliband answered with Labour's post-war Prime Minister and longest-serving Leader, Clement Attlee. He has also spoken positively of his two immediate predecessors as Labour leader, Tony Blair and Gordon Brown, praising their leadership and records in government. Media portrayal Miliband was portrayed during Labour's 2015 election campaign as being genuine in his desire to improve the lives of working people and to display progression from New Labour, but was unable to defeat interpretations of him as being ineffectual, or even cartoonish in nature. Political illustrators perceived a resemblance to Wallace of the British animation Wallace and Gromit and greatly exaggerated this in caricatures; various images circulated in the press and online media of Miliband performing day-to-day activities such as eating a bacon sandwich, donating money to a beggar, and giving a kiss to his wife, all while displaying apparently awkward facial expressions. In a March 2015 Newsnight election debate, he was challenged by Jeremy Paxman as to whether or not he was 'tough enough' to be Prime Minister, responding, "Hell yes, I'm tough enough", in reference to