Text: So by giving the president a sufficiently diversified portfolio--some ranch land in Wyoming, a bit of California coastline, a few blocks in the South Bronx, a hill in Tennessee--we can ensure that the nation's interests and his personal interests coincide.
Entailment: It was ensured that the president's and the nation's interests coincided.
Contradiction: The president's portfolio may have been diversified, but it was still only showing interests of his own.