Al Sharpton has patterned his career so closely after the Jesse Jackson model that he could be justifiably charged with identity theft. Like Jackson, he began wearing a Martin Luther King medallion around his neck. Like Jackson, he started his own civil rights organization. Like Jackson, he ran for president of the United States. Like Jackson, he now has his own radio and television shows. And like Jackson, he has become a confidante of the man who occupies the White House.