Apparently only 5% of Americans believe that the EU is the worlds leading economic power. Most of them think it is China. The reality is shown in the chart below [values from the CIA Factbook].
They are right about the USA being the leading military power. The EU's military budget is $289 billion compared to the $711 billion spent by the USA. The EU has sensibly decided not to bankrupt itself by excessive military spending and pointless attacks on other countries.