Helped along by both President Obama and Bernie Sanders, Clinton has broken her silence on fossil fuel extraction from public lands.
With Hillary Clinton and Bernie Sanders locked in a tight race, either candidate could get a boost from caucus-goers who veer off-script.
In an interview with the New Republic, the former Maryland governor takes the Democratic frontrunner to task on climate change.
Michigan's governor has borne the brunt of the blame, but there's plenty to go around.
A moratorium on coal leases is another notch in his legacy. But it will be up to Hillary Clinton or Bernie Sanders to navigate the fallout.
Fear-mongering about ISIS is just so much easier.
At CNN's forum, the president offered Democratic candidates a model for touting gun control—and hitting back at the NRA.
The Paris deal is the last moment of hope we'll see in a long time.
She has embraced many top priorities of climate activists—but they're still suspicious of her history and her connections to oil and gas.