The OP didn't connect Trump with a bad business model, or with Medium at all actually.
Big picture, Trump, and a Trump presidency, are a huge unknown. It's probably a matter of personal projection what you think the outcome will be, but it can hardly be dismissed out of hand.
For example, do you think Trump, a hotel owner, will support legislation that favours AirBnB? It's not as if he is above petty payback on people he feels have wronged him.
And of course there's a more general effect on the economy. Maybe he'll be great! Maybe he won't. You might think that's a good thing but you can hardly blame employees of vulnerable startups who would rather not lose their jobs.