National Journal: President Obama surprised even his most ardent environmental backers with his impassioned inaugural pledge to fight climate change in his second term. In the State of the Union address Tuesday, hell need to tell Congress and the American people how--specifically--he plans to take on the challenge. If hes honest, it wont be pretty. In his first term, Obama rarely spoke about the urgent and fearful nature of the climate crisis, or how long and difficult--politically, economically, and diplomatically--it...