You aren't kidding! I was skeptical about this, so I checked. Given the list of urban population areas from http://en.wikipedia.org/wiki/List_of_United_States_u

You aren't kidding! I was skeptical about this, so I checked. Given the list of urban population areas from http://en.wikipedia.org/wiki/List_of_United_States_urban_areas http://en.wikipedia.org/wiki/List_of_United_States_urban_are... and a U.S. population estimate of ~312m, you run out of urban centers with >1m people (at #42, Salt Lake City) before even reaching half of the U.S. population (131,980,346)! To put this into some perspective, San Juan, Puerto Rico would be an attractive stop for an aspiring U.S. President (at 2.1m people), if they had the right to vote! Suddenly, U.S. transportation & communications infrastructure problems make a lot more sense. I knew the U.S. was a big place, but I vastly underestimated how spread out our population was.