Barack Obama is the worst US President since World War II, 33 per cent of Americans have said in a new poll released today which gave negative grades for him for his handling of key issues like the economy, foreign policy, terrorism, heatlhcare and environment. America would be better off if Republican Mitt Romney had won the 2012 presidential election, 45 per cent of voters say, while 38 per cent say the country would be worse off, according to the Quinnipiac University National Poll. American voters say 54 - 44 per cent that the Obama Administration is not competent running the government. The president is paying attention to what his administration is doing, 47 per cent say, while 48 per cent say he does not pay enough attention, according to the poll. 52-year-old Obama, now in his second term, is the worst president since World War II, 33 per cent of American voters say while another 28 per cent pick his predecessor in the White House, President George W. Bush. R...