Robert Samuelson has another important article today in the Washington Post: The Flight From Reality. Samuelson points out that while Democrats and Republicans battle over their (relatively minor) issues, neither party is paying any real attention to the truly critical problems that face us as the nation ages (making Social Security and Medicare as they stand now economically unsustainable in the long run), as the continuing flow of unskilled immigrants keep our poverty levels high (whereas we are turning away the skilled immigrants we really need to keep the economy healthy), and as structural issues in the job market (like increasing automation) are hollowing out the middle class.
I would add to his list the looming worldwide social and economic disruption that will come over the next few decades from climate change, and perhaps as well the increasingly poor education that Americans are getting (that keep them from being functional and productive in an increasingly technological and complex world).