In 2008? Obama wasn't even President yet. Impeach the Mother******! https://dailycaller.com/2019/11/15/flashback-obama-fires-bush-ambassadors/
Just the politically appointed ambassadorships like Sondland ,not the career diplomat ambassadors.Just the pay to play appointees.
"The incoming Obama administration has notified all politically-appointed ambassadors that they must vacate their posts as of Jan. 20, the day President-elect Barack Obama takes the oath of office, a State Department official said." https://www.huffpost.com/entry/obama-firing-all-bush-app_n_148026