Clay interviews Craig Fehrman, the author of an important new book on Lewis and Clark, This Vast Enterprise: A New History of Lewis and Clark. Fehrman approaches the great story of the Lewis and Clark Expedition by viewing it through the eyes of the often-overlooked participants: Sergeant John Ordway, Clark's enslaved valet York, and Sacagawea. Rigorously researched and grounded in actual historical discoveries, this book will be essential reading for students of the Lewis and Clark Expedition. In his footnotes, Fehrman begins with a truly remarkable short essay on his methods and historiography. These essays, which amount to 40,000 words, are alone proof that his work needs to be taken seriously. And he's great fun to interview. This episode was recorded on April 9, 2026.

Clay's conversation with Italian journalist Marzio Mian about his new book, Volga Blues: A Journey into the Heart of Russia. Mian and his photographer spent four weeks following the Volga River from its source northwest of Moscow to its mouth on the Caspian Sea. The Volga River is considered the mother and the flowing heart of Russia. Traveling by car with two sometimes dubious Russian guides, Marzio and his partner attempted to stay below the radar of the paranoid Russian government, now grinding through its fourth year of war against its neighbor, Ukraine. In this extraordinary interview, Marzio explains that the Russian people don't see the world as we do in the West. They believe they are fighting a defensive war in Ukraine against NATO, Europe, and the U.S., defending the sacred homeland from western aggression, territorial ambition, and cultural decadence. His goal was to encounter ordinary Russian people, to learn how they see the war in Ukraine, how they view Vladimir Putin now, in the 26th year of his dictatorship, and how they regard the Volga River, the spiritual artery of an ancient and mysterious civilization. This episode was recorded on February 14, 2026.

Guest host David Horton interviews President Thomas Jefferson about his strong anti-royalist principles. In the Declaration of Independence, Jefferson lambasted King George III for his crimes against the American colonists. Jefferson did not go quite as far as Thomas Paine, who called George III "the royal brute of England," but he wanted to eliminate all echoes of monarchism in American public life. Jefferson met George III once in 1786 and came away even more disillusioned than he had been previously with the ways of kings. In France, he met Louis XVI several times and generally liked him, but found him woefully out of touch with the suffering of the great mass of French people. David Horton wondered how Mr. Jefferson would react to the American fascination with British royalty in our time. This episode was recorded on April 28, 2026.

Frequent guest host David Horton interviews the third president of the United States, Thomas Jefferson, about his five years in France between 1784 and 1789. After the death of his wife in 1782, Jefferson permitted his closest friend, James Madison, to propose that he be sent to Europe to negotiate commercial treaties. When Jefferson assimilated his diplomatic post, Dr. Benjamin Franklin finally retired and returned to the United States. At that point, Jefferson became the American Minister to the Court of Louis XVI, which he called a school in humility after the legendary Franklin ceased to grace the French court. Jefferson worked hard to open markets to American products, especially tobacco. Before he returned to the United States in 1789 to become the first Secretary of State, Jefferson witnessed the beginnings of the French Revolution, which he defended for the rest of his life, including the excesses of what is called the Reign of Terror. This episode was recorded on February 25, 2026.

Beau Breslin interviews Clay on current events. First, the successful launch on April 1st of Artemis II, America's first space mission to the moon in more than 50 years. The launch's success was not particularly unexpected, but our relief was palpable when it was nearly flawless. Second, Ken Burns' latest documentary is a three-part study of the life and achievements of Henry David Thoreau. Clay was one of the featured historians in the film. Beau wanted to know what it was like to sit across from the great Ken Burns in an interview. And third, the future of the 14th Amendment, guaranteeing birthright citizenship to all children born in the United States. The Supreme Court recently heard arguments on the topic, though the decision is not expected until late June. This podcast was recorded on April 2, 2026.

Clay and frequent guest Beau Breslin of Skidmore College try to place Donald Trump's war in Iran in the context of American history with a particular emphasis on the war powers language of the U.S. Constitution. The Founders considered war so grave that they did everything in their power to make sure it was not undertaken without the broad support of the American people. Wars must begin in Congress, and particularly the House of Representatives. The House enjoys the power of the purse to fund wars or refuse to fund them. In the last 60 years, presidents have gone to war with decreasing Constitutional respect, but no previous war was undertaken without some level of consultation with Congress. So far, Congress has voted against at least three war powers resolutions that might have put some controls on our incursion into the Middle East. This episode was recorded on March 5, 2026.

Clay's conversation with Dr. Susan Ryan of the Crow Canyon Archaeological Center in Cortez, Colorado, about the history of the National Monuments and Antiquities Act, signed into law by President Theodore Roosevelt on June 8, 1906. The Monuments and Antiquities Act gives the president of the United States virtually unlimited authority to designate national monuments on America's public lands by executive order alone. Teddy Roosevelt named the first 18, beginning with Devils Tower in Wyoming, and, at the end of his second term, established the Grand Canyon National Monument, covering more than 800,000 acres. Most subsequent presidents have designated National Monuments, including Donald Trump in his first term. Dr. Ryan says this vast grant of presidential authority has always been controversial, particularly now, and there are stirrings of a test case that will reach the Supreme Court sometime in the next couple of years. Can a subsequent president reduce the size of a National Monument or remove it altogether? And what oversight does Congress have or should it have in these matters? This podcast was recorded on February 23, 2026.

Frequent guest host David Horton welcomes Thomas Jefferson to the podcast to discuss political theater and State of the Union addresses. Although Jefferson was a master of political theater, he chose not to take his annual State of the Union messages in person to Congress. He sent his messages by courier and assumed Congress would study them at their convenience. After Jefferson makes his views clear, Clay Jenkinson breaks character to discuss the uses and abuses of modern State of the Union addresses. It was Ronald Reagan who began the tradition of the president pointing to extraordinary Americans in the gallery to honor their service and sacrifices, or to lament their sufferings. Donald Trump's recent 2026 State of the Union Message was much more like a reality television show than anything in previous administrations, including a sustained celebration of the U.S. Olympic hockey program. This program was recorded on February 25, 2026.

Clay's conversation with Char Miller, an endowed professor of environmental history at Pomona College and author of more than a dozen highly regarded books. How did America develop its public lands? Who were the key players in the formation of National Parks, Monuments, Forests, Wildlife Refuges, and Game Preserves? How fragile is the public domain at a time when the Trump administration seeks to scale back, privatize, and permit mining and other industrial activities? The conversation includes a segment on Native American sovereignty, the Land Back Movement, and the work of David Treuer, who has suggested that the National Parks and Monuments be returned to Native ownership or, at a minimum, Native co-management. The discussion also assessed the future of the Colorado River system, including the status of Glen Canyon Dam in Arizona. This episode was recorded on January 27, 2026.

Clay's conversation with Erik and Christopher Ewers, the directors of the upcoming three-part documentary on the life and achievements of Henry David Thoreau, the New England radical and the author of Clay's favorite American book, Walden. Five years in the making, with dozens of interviews and fabulous footage of Concord, Massachusetts, and the environs of Thoreau's famous cabin at Walden Pond, this documentary will be the definitive treatment of Thoreau. The directors tell Clay that he is, as they put it, "all over the film," as one of the more significant talking heads. Thoreau was one of the most original and morally courageous of American writers. He denounced slavery with a pure flame of disgust, opposed America's war of expansion against Mexico, defended John Brown after he raided Harpers Ferry, and even suggested some careful monkeywrenching in his book A Week on the Concord and Merrimack Rivers. Thoreau went to the woods to live deliberately and to undertake an experiment in simplicity and minimalism. He wrote some of the most famous sentences in American history, including, of course, "the mass of men lead lives of quiet desperation." This podcast was recorded on February 13, 2026.