A movement is afoot by a United Nations-backed group to get U.S. cities to rebel against President Trump’s decision to abandon the Paris climate deal. And it’s quietly becoming a huge success. ICLEI, founded in 1990 as an international network of local and regional governments committed to “sustainability,” is rounding up support for a massive resistance movement by American cities in which they would forge ahead with what Trump has called a “bad deal for America.” At least 267 mayors and governors have signed an open letter sent to the “international community and parties to the Paris Agreement” stating their...