Substack is the breakout newsletter platform media insiders are watching. Its chief executive says he has big plans — and an open door.
The documentary filmmaker Laura Poitras said First Look Media ended its contract with her because of her public criticisms, an accusation the company denied.
Mr. Greenwald will join other high-profile journalists who have left major media outlets to work largely on their own at Substack.
Internal documents show how a source ended up in jail — and the fallout in the newsroom.