I'm a data journalist intern, and we're using Medium, the online publishing platform, for data-driven blogging. Unfortunately, I've discovered, after finishing my work on Tableau, that Tableau can not be embedded on Medium.
After inquiring, the reason turns out to be that Medium supports embeds provided only by embed.ly.
However, it's easy and free of cost to be an Embedly supported provider. You can view requirements here: Become a Provider | Embedly.
Being able to embed Tableau dashboards and stories would be great news for Tableau users, especially data-driven journalists and bloggers.