David Dunlap, head of the agency's research office and former Koch Industries employee, exchanged e-mails about a health assessment of formaldehyde after saying he'd recuse himself to avoid an appearance of bias. Also, Rick Perry stays laser-focused at the D.O.E even as the impeachment enquiry surrounds him.

Details on the agency's proposed supplemental blending rule for the RFS have both biofuel groups and oil refineries fuming. Also, how did energy and the environmental issues play out on the fourth Democratic presidential debate?

Congress returns to session after a two-week recess, and we're following a tax credit for electric vehicles that may make its way through Congress. Also, what does Neil Chatterjee have to say about leaving FERC?

House Democrats want to know more about the energy secretary's role in the Ukraine scandal, and the EPA unveils regulations related to lead in water.

The head of the EPA is expected to announce updates to its regulations on lead in drinking water.

The state's largest utility company shuts off power for at more than a million people across the Golden State ahead of a "severe wind event."

Amid a growing impeachment inquiry, the Secretary of Energy heads to Latvia to promote "energy security through energy diversity."

The trip comes as the Energy Secretary finds himself facing new questions in the impeachment inquiry centered on Ukraine.

The latest news in energy and environmental politics & policy -- powered by POLITICO’s ten-person energy team and journalists across our newsroom.