BALTIMORE (AP) -- Kweisi Mfume made no secret when he stepped down as president of the NAACP that his sights were set on a Senate seat. But the former congressman said he would wait for Democratic Sen. Paul Sarbanes to decide whether he would stay or go. Three days after Sarbanes, 72, announced that he would not seek a sixth term, Mfume set a news conference Monday at Baltimore's Camden Yards baseball stadium to announce his intentions. Mfume, 56, left the House in 1996 after five terms to become president of the Baltimore-based National Association for the Advancement of Colored...