After Donald Trump’s election, some universities echoed with primal howls. Faculty members canceled classes for weeping, terrified students who asked: How could this possibly be happening?I share apprehensions about President-elect Trump, but I also fear the reaction was evidence of how insular universities have become. When students inhabit liberal bubbles, they’re not learning much about their own country. To be fully educated, students should encounter not only Plato, but also Republicans.Nicholas Kristof