Via email from his campaign yesterday:

As our movement continues to gain traction, we came to realize a few things:

1. The evidence speaks for itself. People have grown tired of having their needs ignored by a corrupt establishment and are rallying to the Green Party to help build a fair and sustainable future for our country.
2. The issues that our campaign is championing truly are the issues that resonate most with the American people. The support that we have received and the stories that you have shared with us only solidify that this movement towards an Ecosocialist Green New Deal is exactly what the country needs to navigate these trying times in our history.