The American Spectator

Politico reports:

EPA policy chief steps down

One of the Obama administration’s most aggressive officials on global warming regulations is stepping down from her post at the Environmental Protection Agency.

Lisa Heinzerling, the head of EPA’s policy office, will return to her position as a Georgetown University law professor at the end of the year, said EPA spokesman Brendan Gilfillan.

Within EPA, Heinzerling is one of the more dogmatic proponents of regulating greenhouse gases to the maximum extent possible under the Clean Air Act.

 There are two camps within the agency on climate, said an environmental advocate who spoke on background. The Heinzerling camp, with the mind-set that, “we have the law on our side; let’s go get them.” In the other camp are Administrator Lisa Jackson and EPA air chief Gina McCarthy, who are trying to maintain the support of the White House and Congress…

“I think she’s probably the farthest left and most committed of anyone on the team, with the exception of Carol Browner,” on climate change, said an industry attorney familiar with the agency, referring to the former agency administrator and President Barack Obama’s energy and climate adviser.

Certain private interests have pursued inquiry of Ms. Heinzerling’s activities while in this perch for some time. I’m just guessing, but this longtime partisan and activist may have heard footsteps and got out while the getting was less bad.