I fear a larger USA would only make things worse. Many republican states and rural areas are already being ignored, jobs are being taken over by illegal aliens, and the economy is not getting any better. My solution would be to downsize, not to become larger. I believe that becoming smaller would help the manageability of the states and their polar opposite opinions.
us of the world, sounds too much like forcing one world (religion, money, etc) I don't ever see it happening since so many countries have their own method of living and the way the usa is at the moment I don't know if other countries like the ideas of being a part of "this". inheriting a mess sounds more troublesome than helpful to any country. I am not so certain I want to gain this mess anyways if I was another country. there would be a lot of discussion coming about to be more tolerate of people's cultures, religions, way of life, etc. before this could even be considered.
The USA is a first-world country. Do you know how many third and second world countries there are. Name one of them that wouldn't want to join us for the possibility of being with one of the greatest civilizations in history.