The post-World War II era would have looked very different had Henry Wallace become president.

Modern vice presidents can trace much of their political influence to the broad reforms that Jimmy Carter and Walter Mondale made to the second-highest elected office in the late 1970s.

Reviving the Monroe Doctrine would take a time machine.

The threat of climate change and the rise of China have prompted renewed debate about the U.S. government’s role in shaping the economy.

The United Nations’ top leadership position has broad authority to steer the organization’s agenda, but its impact has varied widely since 1946.