The media have become principal actors on the American political scene. Politicians and their press secretaries release news items with one eye on the event and the other on the millions of voters who depend on the White House press corps to keep them informed about the workings of their government.

Portraying the President explores the inner workings of the relationship between the White House and the press. Rather than emphasize the well-publicized sparring between inquisitive reporters and evasive administrative spokesmen intent on enhancing the President's public image,...