Lorne Michaels Defends Casting Of Non-Black Man in Sketch By Paul Farhi Washington Post Staff Writer Friday, February 29, 2008; Page C01 When Barack Obama announced his candidacy for president last year, some observers questioned whether the senator from Illinois was "black enough" to embody the hopes and aspirations of African Americans. Now a variation on that theme has emerged: Is Fred Armisen, who is not African American, "black enough" to embody Obama on "Saturday Night Live"? Debate over that question has been pinging around the Internet since Armisen, a veteran cast member, donned darker makeup to portray the Democratic...