The New Republic
The New Republic is a magazine of politics and the arts. It leans left, but tends to outrage liberals with occasionally unorthodox stances, like embracing Reaganism during the Cold War and supporting the Iraq War. TNR's headquarters is in Washington, D.C; but, to the relief of many Columbia student writers, it recently opened an office in New York[1].
Lots of Columbia alumni have edited or written for it, from Leon Wieseltier to Marc Tracy and Lydia DePillis. Alumnus Franklin Foer is currently editor.