Senator Joseph Biden spent his first day as a Democratic presidential candidate Thursday apologizing for remarks about fellow senator and presidential hopeful Barack Obama. Biden ignited controversy after calling Obama “the first mainstream African American who is articulate and bright and clean and a nice-looking guy.” Biden appeared on the radio program of civil rights activist and former Democratic presidential candidate Al Sharpton. Sharpton told Biden: “A lot of people took it from you that because (Obama) is Harvard-trained, that people don’t see someone as good and clean unless they are less connected to the struggle of the African-American community.”