Dan Cantor, New York Working Families Party; Jonathan Soros, Friends of Democracy super PAC; the power of poetry with Martin Espada.

Anti-creationism activist Zack Kopplin; author Susan Jacoby discusses secularism.

Screenwriter Tony Kushner talks about Abraham Lincoln.

Anthony Leiserowitz, director of the Yale Project on Climate Change Communication.

Economist Richard Wolff analyzes income equality; Sheila Bair, former chairperson of the Federal Deposit Insurance Corp.

Bryan Stevenson, founder of Equal Justice Initiative, discusses the American justice system; an essay on the idea of justice for all.

Historian Taylor Branch and theologian James Cone discuss Dr. Martin Luther King Jr.'s vision of economic justice.

Economic inequality in California; writer Sherman Alexie.

Activist Sandra Steingraber discusses protecting children from toxic trespassers contaminating air, water and food.

Journalist Glenn Greenwald discusses the Boston Marathon bombings; political scholars Norman Ornstein and Thomas Mann.

Francine Wheeler, whose son Ben was among the children killed at Sandy Hook Elementary School in Newtown, Conn., and singer Peter Yarrow, discuss the power of music to create change; David Wheeler talks about resolving the gun issue.

Marshall Ganz, senior lecturer in public policy at Harvard University's Kennedy School of Government; Rachel Laforest, executive director of Right to the City and Madeline Janis, co-founder of Los Angeles Alliance for a New Economy.

Public health historians David Rosner and Gerald Markowitz discuss the dangers of lead; Sheila Krumholz, executive director of the Center for Responsive Politics; Danielle Brian, Project on Government Oversight.

Environmental activist Tim DeChristopher, co-founder of Peaceful Uprising; columnist Gretchen Morgenson.

Economic inequality in California; writer Sherman Alexie.

Economist Richard Wolff; activist Saru Jayaraman.

Professor Lawrence Lessig, director of the Edmond J. Safra Center for Ethics at Harvard University.

ALEC -- the American Legislative Exchange Council.

Filmmaker Kristi Jacobson and Mariana Chilton, director of the Center for Hunger-Free Communities, discuss hunger in America; journalist Greg Kaufmann.

First profiled 22 years ago, two American families in Wisconsin struggle to keep up with the changing U.S. economy; authors Barbara Miner and Barbara Garson.

Columnist Marty Kaplan discusses economic inequality in the U.S.; historian Gary May.

Tom Diaz discusses gun control; Baldemar Velásquez fights for the rights of farmworkers.

Rep. John Lewis (D-Ga.) discusses his leadership role during the civil-rights movement of the 1960s.

Director Kristi Jacobson and Mariana Chilton, director of the Center for Hunger-Free Communities, discuss hunger, food insecurity and poverty in America.

Economist Richard Wolff; activist Saru Jayaraman.

Marshall Ganz, senior lecturer at Harvard University's Kennedy School of Government; Rachel LaForest, executive director of Right to the City; Madeline Janis, co-founder of Los Angeles Alliance for a New Economy.

Journalist and author Mark Leibovich discusses his views on Washington, D.C.

Rep. John Lewis (D-Ga.) discusses the 1963 march for civil rights.

Correspondent Deborah Amos, National Public Radio; historian Andrew Bacevich; guest host Phil Donahue.

Davie Zirin, sports editor of The Nation.

Former Secretary of Labor Robert Reich discusses the movie "Inequality for All," which examines income disparity in America.

Kumi Naidoo, international executive director of Greenpeace.

Writer Wendell Berry discusses the environment.

Yale Law School professor Heather Gerken discusses McCutcheon v. Federal Election Commission; historian Joyce Appleby.

British journalist Martin Wolf discusses the debt ceiling debate and its potential impact on the global economy; MIT professor Sherry Turkle.

Financial journalist Gretchen Morgenson; historian Peter Dreier.

Yves Smith, the Naked Capitalism blog; Dean Baker, co-director of the Center for Economic and Policy Research; a preview of "Unmanned: America's Drone Wars."

John Nichols, The Nation; professor Robert McChesney.

Dr. Jill Stein, co-founder of the Massachusetts Coalition for Healthy Communities; Dr. Margaret Flowers, Physicians for a National Health Program.

Author Henry Giroux; remembering novelist Doris Lessing; the documentary "Birth of the Living Dead."

Author and environmental activist Wendell Berry; short documentary "Dance of the Honey Bee."

Mark Leibovich, The New York Times Magazine, discusses Washington's powerbrokers.

Historian Richard Slotkin talks about guns and violence in America.

Civil rights lawyer and legal scholar Michelle Alexander.

Historian Thomas Cahill discusses Pope Francis and the relevance of the church in the 21st century.

The battle of American politics rages on in North Carolina.