Associated Press: The United States put forth its contribution Tuesday to a global climate treaty, relying entirely on a set of emission cuts ordered by President Barack Obama that may not survive beyond the end of his presidency.
Environmental groups and like-minded governments hailed the U.S. pledge as substantial and ambitious, and Obama's aides waxed hopeful that the U.S. announcement would spur other countries to follow America's lead. Yet with Obama's actions at home facing serious legal challenges and intense...