Most of us of a certain age remember the 1992 Los Angeles riots, in which 53 people were killed and more than 2,000 injured, and the subsequent plaintive cry of Rodney King, “Why can’t we all just get along?” King’s question resonates today because of continued partisan bickering both inside and outside of Washington and the widely held perception that, instead of being united, the red and blue states of America have devolved into separate nations. The answer, of course, is that even …