There’s a divine level drama behind this. Sometimes all plausible candidates are unknowns as viewed from outside. And so God allows them to be put to the test. A failure in position A may not mean a failure in position B, etc.
A failure in position A may not mean a failure in position B, etc
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Tillerson was Chairman of EXXON. So to rise to that level he had mgmt skills
but those skills may not apply to those needed to manage a government Group.