"Many Berning hearts are breaking right now," she tweeted.

Many Berning hearts are breaking right now. — Dr. Jill Stein (@DrJillStein) July 12, 2016

It sounds like the only good thing Bernie can say about Hillary is that she's not Donald. That's what most of her supporters like about her. — Dr. Jill Stein (@DrJillStein) July 12, 2016

Stein bashed Clinton and her policy positions and questioned her commitment to the proposals she has outlined, including on climate change and student debt.

"Hillary gives lip service to climate change, but she's spread fracking around the world as [secretary of State]. Won't stop 9ft sea level rise by 2050," she tweeted.

Hillary gives lip service to climate change, but she's spread fracking around the world as SecState. Won't stop 9ft sea level rise by 2050 — Dr. Jill Stein (@DrJillStein) July 12, 2016

There is only one candidate that supports abolishing student debt for the young people that will lead the way forward. It's not Hillary. — Dr. Jill Stein (@DrJillStein) July 12, 2016

"There is only one candidate that supports abolishing student debt for the young people that will lead the way forward. It's not Hillary."

Stein also scheduled a Facebook Live event titled "Whats next for our revolution?" at 8 p.m.