As the presidential primaries enter their hothouse phase, one 2016 election lesson is clear: the United States’ demographic shifts are more politically important now than in other recent contests. Of course, this new diversity has been coming for some time — much of it driven by immigration patterns and low birth rates among native-born Americans....

The LA Unified school district plans to expand its dual language immersion program next fall, adding Spanish language programs to three elementary schools in the district. According to LAUSD officials, that brings the total number of dual language programs offered by the district to 57, including 43 in Spanish, 10 in Korean, and four in...