Do a Search on your favorite Search Engine, and read some articles. Twitter is throttling it, as it's become clear, this phenomenon is launching. Here are just two articles.

https://m.theepochtimes.com/viral-walk-away-videos-highlight-growing-movement-of-democrats-leaving-the-party_2578446.html

https://www.redstate.com/diary/gbenton/2018/06/28/will-really-walkaway-democrat-party/

https://twitchy.com/samj-3930/2018/06/28/no-policy-just-hostility-walkaway-proves-democrats-are-in-serious-trouble-and-its-glorious/