You have a short memory, Anon.
He did remain on and in a senior role as stated by the DOJ.
https://www.politico.com/story/2019/02/15/whitaker-justice-department-attorney-general-counselor-1172109
Duration stated? >nope
Why are key positions always interchanging? <to keep DS off-balance and draw fire?
Logical thinking by oneself clarifies easy-to-answer questions.