https://thinkprogress.org/trumps-temperament-and-ongoing-legal-troubles-are-scaring-off-potential-candidates-for-top-posts-b81873edcc03
"President Donald Trump’s volatile temperament, an intensifying investigation into his aides’ possible collusion with Russia, and his firing of FBI Director James Comey, have made it a challenge to recruit and fill top leadership posts across the government, according to the Washington Post."