ills to George Bush", citing critics who felt that "his relentless partisanship is getting in the way of his argument" and claiming errors of economic and political reasoning in his columns. Daniel Okrent, a former The New York Times ombudsman, in his farewell column, criticized Krugman for what he said was "the disturbing habit of shaping, slicing and selectively citing numbers in a fashion that pleases his acolytes but leaves him open to substantive assaults". Krugman's New York Times blog is "The Conscience of a Liberal", devoted largely to economics and politics. Five days after 9/11 terrorist attacks, Krugman argued in his column that the calamity was "partly self-inflicted", citing poor pay and training for airport security driven by the transfer of responsibility for airport security from government to airlines. His column provoked an angry response and The New York Times was flooded with complaints. According to Larissa MacFarquhar of The New Yorker, while some people thought that he was too partisan to be a columnist for The New York Times, he was revered on the left. Similarly, on the 10th anniversary of the 9/11 on the United States Krugman again provoked a controversy by accusing on his New York Times blog former U.S. President George W. Bush and former New York City mayor Rudy Giuliani of rushing "to cash in on the horror" after the attacks and describing the anniversary as "an occasion for shame". Krugman was noteworthy for his fierce opposition to the 2016 presidential campaign of Bernie Sanders. On January 19, 2016, he wrote an article which criticized Bernie Sanders for his perceived lack of political realism, compared Sanders' plans for healthcare and financial reform unfavorably to those of Hillary Clinton, and cited criticisms of Sanders from other liberal policy wonks like Mike Konczal and Ezra Klein. Later, Krugman wrote an article which accused Sanders of "[going] for easy slogans over hard thinking" and attacking Hillary Clinton in a way that was "just plain dishonest". On the 12 July 2016, Krugman tweeted "leprechaun economics", in response to Central Statistics Office (Ireland) data that 2015 GDP grew 26.3% and 2015 GNP grew 18.7%. The leprechaun economics affair (proved in 2018 to be Apple restructuring its double Irish subsidiaries), led to the Central Bank of Ireland introducing a new economic statistic, Modified gross national income (or GNI*) to better measure the Irish economy (2016 Irish GDP is 143% of