On the day of his second Inauguration, in January, Barack Obama delivered an address of unabashed liberal ambition and promise. As recently as early April, before the realities of the world and the House of Representatives made themselves painfully evident, the President retained the confidence of a leader on the brink of enormous achievements. It seemed possible, even probable, that he would win modest gun-control legislation, an immigration-reform law, and the elusive grand bargain with Republicans to resolve the serial crises over the federal budget. And he seemed determined to take on even the most complicated and ominous problem of all: climate change. The President, who had a mixed environmental record after his first term, vowed that he would commit his Administration to combatting global warming, saying that “failure to do so would betray our children and future generations.”

via Ryan Lizza: How the Keystone XL Pipeline Tests the Administration’s Resolve on Climate Change : The New Yorker.