Gov. Chris Christie of New Jersey offered a prescription for what he called a “North American energy renaissance” in an expansive speech here, calling for an end to Washington’s 40-year ban on crude oil exports, faster approval of natural gas pipelines between the United States and Mexico , and construction of the Keystone XL pipeline from Canada to the Gulf Coast. On the opening day of Mr. Christie’s trip to Mexico, a rare journey abroad as he considers a run for the presidency, he abandoned his trademark swagger for a data-filled, policy-rich and humility-heavy approach. He quoted the writer Bill Bryson and the energy expert Daniel Yergin. He offered lavish praise for the market-oriented overhauls of the Mexican president, Enrique Peña Nieto. And he took pains to present himself, over and over, as an eager student prepared to absorb the lessons of his Mexican counterparts. “I […]