New York Times: At the end of his first year in office, President Obama flew to Copenhagen and made a big promise: that the United States would cut its greenhouse gas emissions substantially by 2020 a bold and risky pledge that hinged on a balky Congress to make it possible. His efforts became bogged down within months, and Mr. Obamas pledge to the rest of the world soon looked like a pipe dream. On Monday, Mr. Obama is planning to bypass Congress and take one of the biggest steps any American president has...