Theodore Rex tells the story of the following seven and a half years-years in which Theodore Roosevelt entertains, infuriates, amuses, strong-arms, and seduces the body politic into a state of almost total subservience to his will. It is not always a pretty story: one of the revelations here is that Roosevelt was hated and feared by a substantial minority of his fellow citizens. Wall Street, the white South, Western lumber barons, even his own Republican leadership in Congress strive to harness his steadily increasing power.

Within weeks of arrival in Washington, Roosevelt causes a nationwide sensation by becoming the first President to invite a black man to dinner in the White House. Next, he launches his famous prosecution of the Northern Securities Company, and follows up with landmark antitrust legislation. He liberates Cuba, determines the route of the Panama Canal, mediates the great Anthracite Strike, and resolves the Venezuela Crisis of 1902-1903 with such masterful secrecy that the world at large is unaware how near the United States and Germany have come to war.