Washington Post: On this unseasonably mild December Saturday in Washington, President Barack Obama had reason to bask in the sun.
Across the Atlantic, international climate negotiators in Paris were poised to approve an agreement that owed much of its success to the willingness of the U.S. president to take on congressional Republicans and fossil-fuel-industry executives on an issue that consistently ranks among the lowest priorities for American voters.
Though the international agreement still leaves the world...