There’s an excellent post on the subject, here. (Inspired by Jonah Goldberg and his recently published book, Liberal Fascism.) [UPDATE (02/11/08): See also this, by Thomas Sowell.]
Related posts at Liberty Corner include:
“Calling a Nazi a Nazi” (12 Mar 2006)
“Things to Come” (27 Jun 2007)
“FDR and Fascism” (30 Sep 2007)
“A Political Compass: Locating the United States” (13 Nov 2007)
“The Modern Presidency: A Tour of American History since 1900” (01 Dec 2007)
“Intellectuals and Capitalism” (15 Jan 2008)
“Political Correctness” (29 Jan 2008)
“The People’s Romance” (30 Jan 2008)
“Fascism” (30 Jan 2008)
Politics and Prosperity 