Washington, June 28 : Americans believe that neither US President Barack Obama nor presumptive Republican Mitt Romney has a plan to improve the country''s economy, according to a new poll. According to Fox News Poll, almost 53 percent Americans said that Obama did not have a plan to improve the economy and a 55 percent said the same for Romney. According to the poll, almost 49 percent Republicans feel Romney has a plan to help the economy, while 72 percent Democrats said the same for Obama. (ANI)