Well, considering that the Hispanic nation south of our border (aside from Cuba) that dislikes us most is Los Estados Unidos de Venezuela, I doubt it. I was just amused that such a trivial issue should even arise. But, then again, our state governments are forever passing legislation to authorize things like official state fossils (mine has one, does yours?) . . .
caw
Actually it's República Bolivariana now, though. Estados Unidos was actually phased out by a pro-US dictatorship in the 50's to guarantee less federalism and more central government, something at first glance I suspect may be a factor here, I don't know how Calderón feels about centralism.
But thinking it has something to do with the US seems arrogant to me. You know, on a second thought, perhaps is simply to avoid confusion since the United States is simply known as such to Latin Americans and never "America", so it makes sense to mark a different between "The United States of Mexico" and "The United States".
To be frank, Mexican Federation or Republic of Mexico sounds better to me. I always thought Mexico used "Republic" and "United States" interchangeably.