Biden Camp Dismisses 'Clean' Remark By JAKE TAPPER January 31, 2007— Senator Joe Biden, D-Dela., the loquacious chairman of the Senate Foreign Relations Committee who launched his presidential campaign on Wednesday may be experiencing an ailment not entirely unknown to him: foot in mouth disease. Instead of media attention for his experience or expertise on Iraq, Biden is today taking some heat for comments he made to the New York Observer, in which he says of a rival for the nomination Sen. Barack Obama, D-Ill.: "I mean, you got the first mainstream African-American who is articulate and bright and clean...