It's the economy stupid - or It's the Political/Military Power?

Michael Snyde of the business insider's blog on the economic collapse of  the US is providing a wealth of information on the economic undercurrents of the global economy.Snyde's arguments are from "It's the economy stupid" standpoint.

Even the well meaning Obama has resorted to political gimmicks like killing Osama bin Laden to sustain himself. He seems to tell everyone that "It's the political/military showmanship, stupid".

The military and political might of the US is what sustaining the US's global standing today. Technological leadership is also a crucial factor. "It's the economy, stupid"  argument seems to be valid only during the elections in the US.

Can the US reshape its economy just by its political power just like it is imposing its will on other countries.
or, the next country to be invaded by the US military would the USA itself.