When racial tensions erupt, some presidents advance the nation toward a more perfect union, while others thwart its progress.

The presidents who have made the most impact have imagined what America could be. Through their rhetoric, their leadership or their sheer force of personality, these presidents have dared Americans to join them in their vision for a better future.

Explores how some US Presidents have exerted power over the economy through various measures including taxation, imports and exports and law making, and the effects those actions had on the lives of American citizens.

The United States was born in the flames of violence and rebellion and extremism has always been a part of American identity. This is a look at the ways in which American presidents have reacted to extinguish or fan the flames of extremism.

America's Constitution starts with the words `We the people'. Every US president has faced the question of who, exactly, is included in this soaring phrase. This is an examination of the presidential decision-making for many disenfranchised citizens.

Traces the rise of America's place on the world stage. Becoming a superpower has altered not just America's fate, but that of the world as well, and with great power comes great responsibility.