David Frum is a writer at The Atlantic and the author of the 2018 New York Times bestseller, TRUMPOCRACY: The Corruption of the American Republic, which was his ninth book. In 2001 and 2002, he served as special assistant and speechwriter to President George W. Bush during and after the 9/11 attacks on the U.S.

Frum is a recognized intellectual leader of the American conservative movement and has served as a fellow at the American Enterprise Institute, as a trustee of the Republican Jewish Coalition and as chairman of the board of trustees of Policy Exchange, a U.K. centre-right think tank. A native of Canada, he was a driving force in the ‘Winds of Change’ movement that reunited the country's splintered Conservative Party in the early 2000s. From 2009 to 2012, Frum created and edited the FrumForum group website devoted to the modernization of the Republican party. More than a dozen young writers who started their careers on Frum's site have gone on to success in politics and journalism.

Frum was one of the first and foremost conservative Republicans to sound the alarm about the challenge posed by the Trump presidency to U.S. global leadership, open international trade and democratic institutions. His prophetic 2017 cover story in The Atlantic, ‘How to Build an Autocracy,’ has been one of the most cited articles on Trump to date.

He appears frequently on CNN, MSNBC and the Australian, British and Canadian Broadcasting Corporations. A profile in Esquire in December 2017 described Frum as "first among equals" in the conservative anti-Trump movement.

Frum earned his bachelor of arts and master’s degree in history at Yale, then a juris doctor at Harvard, where he served as president of the Harvard chapter of the Federalist Society. He taught history at Yale between 1986 and 1987.

He is married to Danielle Crittenden Frum, a journalist, author and podcaster. They have three children and live in Washington D.C. and Wellington, Ont.