This is a moment I’ve waited for, a moment millions of Democrats have waited for: Elizabeth Warren’s endorsement of Hillary Clinton for president.

Warren’s credibility among progressives is unassailable. Her words matter:

Hillary Clinton won. And she won because she’s a fighter, she’s out there, she’s tough. And I think this is what we need. Look at who she is: For 25 years, she’s been taking the incoming. The right wing has thrown everything they possibly can at her. And what does she do? A lot of people would just hang up their spurs, say you know, I’ve had enough of this. And she doesn’t. What she’s done is she gets back up and she gets back in the fight. As a Democrat, one of the things that frustrates me the most is there are a lot of times we don’t get in the fight. … You ought to be willing to throw a punch. And there are a lot of things that people say about Hillary Clinton. But nobody says that she doesn’t know how to throw a punch.

Watch the intensity and passion in Warren’s face when she describes Hillary’s indomitable spirit:

(AP Photo/Nick Wass)