The morons fired every federal employee who was classified as “probationary”, in multiple departments. This is all employees with less than 90 days in their current role, but because these idiots don’t know anything about anything, they assumed it meant new hires only.

Others have pointed out that the US largely practices “at will” employment (IIRC, only one state doesn’t), and that’s true, but government workers do tend to have stronger protections than private sector workers. But probationary status is a whole other can of worms.