Leonard Steinhorn is a professor of communication and affiliate professor of history at American University, where he teaches politics, strategic communication, recent American history, and courses on the presidency.
Steinhorn is a Phi Beta Kappa graduate of Vassar College, where he received a bachelor's degree in history. He later received his master's degree in history from Johns Hopkins University. For several years, he worked as a speechwriter, press secretary, and policy advisor for members of the United States Congress.
In 1995, Steinhorn began teaching at American University in Washington, D.C. He was voted American University Faculty Member of the Year in 1999 and 2001 and he also was named Honors Professor of the Year in 2010. From 2002 to 2004, he was president of American University's chapter of Phi Beta Kappa. He has served as the Director of the Public Communication Division, and is both a professor of communication and an affiliate professor of history.
Since 2012 he has served as a political analyst for CBS News, and before that he was a political analyst for FOX-5 News in Washington, DC. 
In 2010, Steinhorn founded the website PunditWire with Robert Lehrman, an adjunct professor in American University's School of Communication and former speechwriter for Al Gore. PunditWire is a news commentary site whose contributors are all current or former speechwriters from across the political spectrum. PunditWire is sponsored by American University.
Steinhorn wrote The Greater Generation: In Defense of the Baby Boom Legacy (2006) and co-authored By the Color of Our Skin: The Illusion of Integration and the Reality of Race (1999).
He has been published in the Washington Post, Salon, New York Times, Politico, The Hill, International Herald Tribune, Huffington Post, World Financial Review, and History News Network, among others.
Publishers Weekly called it a "powerful book" and wrote that "Steinhorn forcefully and gracefully defends his age cohort against these stereotypes in a paean to the generation that forever altered the face of American culture. 
Salon.com wrote that Steinhorn's "unapologetic celebration of the boomer legacy is refreshing, and much of his argument is convincing," but criticized it for sentimentalizing boomers
- "Steinhorn Biography" (PDF). American University School of Communication. 2008. Retrieved 6 November 2009.
- American University. "Profile Leonard Steinhorn", Retrieved on November 8, 2015.
- "PunditWire About". Retrieved 21 February 2011.
- "Robert Lehrman Biography". Retrieved 21 February 2011.
- Kamiya, Gary (3 February 2006). "Talkin’ bout my generation". Salon.com. Retrieved 9 October 2009.
- "The Greater Generation: In Defense of the Baby Boom Legacy". Retrieved 13 November 2009.
- "Sanders and Trump: How the Political and Media Establishment Got 2016 So Wrong" "History News Network", 16 February 2016.
- "A Disunited United States: What the 2016 Election Says About America" "World Financial Review", 04 February 2016.
- "Prejudice is a powerful force" "The Hill", 30 June 2015.
- " A Love that Lasts" "Vassar Quarterly", Winter 2014.
- "50 Years ago Congress gave the President a Blank Check for War." "History News Network", 3 August, 2014.
- "A MAD Commencement Seasaon." "The Hill", 19 June, 2014.
- "War, Liberalism, Trust in Government: The Many Casualties of LBJ's Gulf of Tonkin Resolution" "Huffington Post", 4 August 2014.
- "The GOP's Racial DNA.""The Hill", 6 June, 2014.
- "Armed, Locked and Loaded: The Worst and Most Intimidating Gun States." "Huffington Post", 21 March, 2014.
- "The Irony of Mitt Romney's 47 Percent." "Huffington Post", 20, September 2012.