He was a lecturer in political science at Yale University from 1999 to 2020, teaching undergraduate seminars on American national identity and on journalism, liberalism, and democracy.
He was also an occasional commentator on the PBS News Hour[12] and National Public Radio’s All Things Considered.
Sleeper's recent work has appeared in Salon,[13] Foreign Policy,[14] Democracy,[15] The New Republic,[16] Dissent,[17] and Asia Sentinel.
[20] He also writes extensively about Trumpism and other crises of the American republic, including controversies over freedom of speech.
[21] Sleeper has previously written on the Obama administration,[22] Occupy Wall Street,[23] Yale University's venture to establish an undergraduate college in collaboration with Singapore,[22] and gun control in the United States.