With all of the people resigning or turning down positions in the Cabinet, I was wondering if this is just a common problem that other presidents have faced.
When a member volunteers their resignation it usually is to protest a policy. The most memorable resignation was when President Carter's Secretary of State Cyrus Vance resigned because he disagreed with the plans for Operation Eagle Claw (the failed rescue mission for the hostages in Iran). The Carter administration did not announce the resignation until days after the mission failure to make it seem unrelated. It later came out Vance vehemently disagreed with the planned operation and thought that it would only endanger the lives of the hostages.