When is it, who's moderating, and what's it about?

She has embraced many top priorities of climate activists—but they're still suspicious of her history and her connections to oil and gas.

The voice, the passion, and the body language of the Democratic candidate were impossible to ignore.

Democrats should make a convincing case against it, but change must come from within the GOP

Saturday's debate is a chance for Clinton, Sanders, and O'Malley to deflate the Republicans' politics of paranoia.

To win, she needs voters to feel hopeful—but most Americans are still more anxious than optimistic.