Heather Zichal, President Obama’s top energy and climate change adviser, is leaving the White House. Zichal has worked behind the scenes and been a public face for President Obama’s climate and energy platform, including controversial second-term plans to limit carbon emissions from power plants. [snip] Prior to coming to the White House, Zichal was a policy director on President Obama’s 2008 campaign. Before that, she was legislative director for ex-Sen. John Kerry (D-Mass.), who is now secretary of State. Her departure in the next few weeks will mark what has been an almost complete turnover of Obama’s energy and environment...