If its balance sheet is any indication, Donald Trump’s presidency has been very good for the Southern Poverty Law Center. The SPLC's already impressive endowment grew a staggering 35 percent in fiscal year 2017 to more than $432 million. Including operating funds, total assets topped $477 million as of October 31, 2017. Total revenues and gains in fiscal 2017 exceeded $180 million, more than triple the organization's expenses for the year, of just under $60 million. The SPLC has long been considered a fundraising powerhouse, but 2017's take was mind boggling by any standard. Donations were up 164 percent over...