Jimmy Carter: The American Presidents Series: The 39th President, 1977-1981 by Julian E. Zelizer:
On November 4, Iranian students stormed the American embassy in Tehran. They captured over fifty soldiers and diplomats. A hostage crisis had begun. Upon telling the president the situation, Hamilton Jordan—who was struggling against accusations that he had used cocaine at a New York nightclub—predicted that this would be a defining issue for the administration and in the 1980 election.