It might seem strange to call a member of the Kennedy family "a political outsider," and yet Robert F. Kennedy Jr.'s outsider label is fueling his quest for the White House this year. Kennedy's supporters see a man who speaks the truth and is running against "the system."   Kennedy has told supporters, "I know that when I get into the White House, I can give you back your country." In an age when trust in government is seen as having reached a low point, Kennedy is attracting both...