Perspective.

Robert F. Kennedy started his public life as counsel to red-baiting Sen. Joseph McCarthy, but ended that life as a liberal icon. Kennedy was assassinated during a campaign to unite working-class whites with poor blacks and Latinos in an electoral coalition that looked to change presidential politics. In the second of a two-part series on Perspective today, we conclude our look at some of what drove Senator Kennedy to evolve from a hard-driving conservative to a fiery liberal.   Guest: Larry Tye is the author of "Bobby Kennedy: The Making of a Liberal icon." He is also the author of a number of other books, including "Satchel," "Superman," "The Father of Spin," "Home Lands," and "Rising from the Rails." In addition, Tye has been an award-winning journalist at the Boston Globe and a Nieman Fellow at Harvard University.   Perspective is a weekly public affairs program hosted by Richard Baker, communications professor at Kansas State University. Perspective has been continuously produced for radio stations across