As the Department of Energy heads into its first year under Energy Secretary Dan Brouillette, the agency's hope of accomplishing a host of energy priorities will largely fall on key staffers who keep the agency running.

Climate change and environmental issues have taken on an unprecedented role in the 2020 presidential election.

Seventy thousand or so Interior Department employees — in other words, the entire roster of career staffers and political appointees — will be worth watching in 2020.

EPA has a busy year ahead.