Except they didn't quote an "anonymous source," they quoted Scaramucci directly. "Scaramucci confirmed to POLITICO early Tuesday that he planned to start by dismissing assistant press secretary Michael Short at a morning meeting, but that move was apparently delayed." Link
On the record, straight from the horse's mouth. The Mooch has to remember who he talks to and what about.
Politico claims that he told them — Politico claims a lot of things, some of which are actually true. Has he confirmed that he told them?