Two weeks ago, the Republic of Ireland underwent a seismic political change. Sinn Fein, a left-wing nationalist party, made huge gains in the general election - a surprise that has seen Prime Minister Leo Varadkar ousted from power. New Yorker journalist and "Say Nothing" author Patrick Radden Keefe joins Christiane to discuss this major change.

When McKay Coppins, a journalist for The Atlantic, created a Facebook page so he could follow pro-Trump social media accounts and communicate with online Trump supporters, he uncovered something remarkable: a campaign-coordinated effort to undermine journalists and the mainstream press on a mass scale. Coppins told Hari Sreenivasan about his findings.

Last night in Nevada, voters saw a heated Democratic debate. Vanessa Hauc, a journalist for Telemundo, was one of the debate’s moderators and Van Jones is a former special adviser to President Obama. They join Christiane to break down the political fallout from last night and the issues that matter most to these voters.

Tragedy has struck Germany after a suspected far-right gunman went on a murder spree last night, killing nine people in the city of Hanau. Katarina Barley is a member of the European Parliament and was previously a Justice Minister who served in Angela Merkel’s government until last year. She joins Christiane to reflect on the tragedy and to address the roots of such an atrocity.

Clearview AI is an astonishing piece of technology—a groundbreaking facial recognition app that collects billions of images from social media and all across the internet. Law enforcement agencies around the world are becoming enthusiastic clients, using the app to identify suspects. Hari speaks to the company's co-founder and CEO, Hoan Ton-That, about the app's implications for society.

The new documentary "Black Patriots" examines African American revolutionaries who fought in America’s War of Independence. From the initial sparks of revolution to the climactic Siege of Yorktown, the program tells the story of the revolution from the point of view of key African Americans active in the founding of the republic. Executive producer Kareem Abdul-Jabbar joins Christiane to discuss.

President Assad’s offensive in Syria, backed by the Russians, has hundreds of thousands fleeing for their lives. The Human Rights Commissioner for the United Nations has called the Idlib assault "cruelty beyond belief." David Miliband, CEO of the International Rescue Committee, joins Christiane to discuss the grave situation on the ground.

Yale University's Timothy Snyder is a historian and author who has devoted much of his career to understanding the rise of tyranny in different parts of the world. He sits down with our contributor Ana Cabrera to discuss the health of American democracy and a worrying trend taking root in the U.S.

2020 Presidential candidate Michael Bloomberg has qualified and will join the Democratic Nevada primary debate. As he enters the spotlight, so too do some of the more controversial aspects of his history, both as a private citizen and as a policymaker. Timothy O'Brien, Senior Advisor to Bloomberg's campaign, joins Christiane to respond to recent criticisms.

The fallout from coronavirus threatens both the general health of the public and the established political order in China. To break down how the disease continues to afflict the global population and the implications for Chinese President Xi, Christiane speaks to journalist John Pomfret and CNN Medical Correspondent Elizabeth Cohen.

The new PBS Frontline documentary, "Amazon Empire: The Rise and Reign of Jeff Bezos," explores how Amazon founder Jeff Bezos built the juggernaut that we know today. The film's director, James Jacoby, joins Hari to explain Amazon’s rise as an online bookseller into a trillion-dollar business with no competitor in terms of scale.

In his first TV interview since the acquittal of President Trump, President Zelensky sits down exclusively with Christiane to discuss Trump's claim that Ukraine is "the third most corrupt country in the world."

Though impeachment is in the rear-view mirror, House Speaker Nancy Pelosi has a lot on her plate with a fractious Democratic contest for the presidential nomination in play. Christiane spoke with Speaker Pelosi live from the Munich Security Conference in a fascinating, exclusive interview.

Known for her sardonic wit, social commentator Fran Lebowitz is a New York legend. A prominent liberal Democrat with a keen political eye, Lebowitz has been unsparing in her criticism of Democrats and Republicans alike. Who better to break down the antics of President Trump and the 2020 Democratic candidates with our Walter Isaacson? She gives her take on 2020's swirling political currents.

Journalist Rebecca Traister has tracked the historical challenges facing women and how such obstacles have served as political fuel. Her book, "Good and Mad: The Revolutionary Power of Women’s Anger," offers an interesting look into the galvanizing force of women’s anger and how it has been used to create change. She joins Christiane to put this in the context of the 2020 election.

Alongside her husband and two others, Esther Duflo won a Nobel Prize for Economics last year for her experimental approach to alleviating poverty in the developing world. She is the first female economist to win the prestigious award. She joins Christiane to discuss the scarcity of women in her field and her hopes that more will soon join the ranks.

Racism isn’t just about hatefulness or ignorance, it is also a structural phenomenon. Ibram Kendi, author of the new book "How to Be an Antiracist," argues that neutrality is not an option in the racism struggle—people must take active measures if they wish to end discrimination. Kendi sits down with Hari Sreenivasan to discuss how his own personal experiences have shaped how he sees prejudice.

Douglas Wigdor represents Tarale Wulff, a witness in the Harvey Weinstein trial, who has been called upon by the prosecution to share her story. She claims that Weinstein raped her in 2005 and her testimony has been used by prosecutors to demonstrate a clear pattern of behavior from the accused. Wigdor joins Christiane to give an insider account of what he has called an "emotional" trial.

One week after President Trump was acquitted by the United States Senate, questions have once again been raised over how he wields his power. It appears that Attorney General William Barr has directly intervened in the prison sentencing of a well-known Trump ally, Roger Stone. Former FBI Deputy Director Andrew McCabe joins the program to discuss whether or not this constitutes an abuse of power.

Gilbert Gee is a professor at UCLA's Fielding School of Public Health, and he says the coronavirus outbreak reminds him of what happened during both the SARS and AIDS crises. As the battle against the current outbreak continues, Gee tells Hari Sreenivasan about racism's role in public health emergencies.