Live from the LBJ Library with Mark Updegrove

Vanderbilt University history professor Nicole Hemmer discusses her latest book, Partisans, on the marked changes the GOP has undergone since the celebrated presidency of Republican icon Ronald Reagan nearly 40 years ago.

Vanderbilt University history professor Nicole Hemmer discusses her latest book, Partisans, on the marked changes the GOP has undergone since the celebrated presidency of Republican icon Ronald Reagan nearly 40 years ago.

Vanderbilt University history professor Nicole Hemmer discusses her latest book, Partisans, on the marked changes the GOP has undergone since the celebrated presidency of Republican icon Ronald Reagan nearly 40 years ago.

Vanderbilt University history professor Nicole Hemmer discusses her latest book, Partisans, on the marked changes the GOP has undergone since the celebrated presidency of Republican icon Ronald Reagan nearly 40 years ago.

Julian Zelizer, professor of History and Public Affairs at Princeton University and CNN political analyst, puts the challenges we face as a nation today into historical context.

Julian Zelizer, professor of History and Public Affairs at Princeton University and CNN political analyst, puts the challenges we face as a nation today into historical context.

Julian Zelizer, professor of History and Public Affairs at Princeton University and CNN political analyst, puts the challenges we face as a nation today into historical context.

Julian Zelizer, professor of History and Public Affairs at Princeton University and CNN political analyst, puts the challenges we face as a nation today into historical context.

Heather Cox Richardson, Boston College professor, author of Democracy Awakening, and writer of the daily newsletter, "Letters from an American," outlines the threats to American democracy throughout history and provides insight on how the nation can overcome its current challenges.

Heather Cox Richardson, Boston College professor, author of Democracy Awakening, and writer of the daily newsletter, "Letters from an American," outlines the threats to American democracy throughout history and provides insight on how the nation can overcome its current challenges.

Best-selling author Jonathan Eig discusses his acclaimed book King: A Life, the first major biography of Martin Luther King, Jr.

Best-selling author Jonathan Eig discusses his acclaimed book King: A Life, the first major biography of Martin Luther King, Jr.

Best-selling author Jonathan Eig discusses his acclaimed book King: A Life, the first major biography of Martin Luther King, Jr.

Best-selling author Jonathan Eig discusses his acclaimed book King: A Life, the first major biography of Martin Luther King, Jr.

Admiral William McRaven, Navy Seal and leader of the U.

Admiral William McRaven, Navy Seal and leader of the U.

In part 1 of a two-part interview, legendary Washington Post reporters Bob Woodward and Carl Bernstein reflect on their early careers and how they came to report on the Watergate scandal that ultimately led to President Nixon's resignation 50 years ago.

In part 1 of a two-part interview, legendary Washington Post reporters Bob Woodward and Carl Bernstein reflect on their early careers and how they came to report on the Watergate scandal that ultimately led to President Nixon's resignation 50 years ago.

In part 2 of the two-part interview, renowned reporters Bob Woodward and Carl Bernstein compare how the political and media landscapes of today differ from the time of the Watergate scandal they investigated over 50 years ago.

In part 2 of the two-part interview, renowned reporters Bob Woodward and Carl Bernstein compare how the political and media landscapes of today differ from the time of the Watergate scandal they investigated over 50 years ago.