This episode's headline: Unionizing Doctors; Russia'sAnger; Emphasis - Election 2000 - Campaign Agenda; Send in the Clowns. ANCHOR: JIM LEHRER; GUESTS: DR. THOMAS REARDON, President, AMA; DR. JOHN HARVEY, Georgetown University; RON POLLACK, Families USA; CHIP KAHN, Health Insurance Association of America; DORIS KEARNS GOODWIN; MICHAEL BESCHLOSS; HAYNES JOHNSON; LINDA CHAVEZ; SHELBY STEELE; CORRESPONDENTS: MARGARET WARNER; JEFFREY KAYE; BETTY ANN BOWSER; JIM FISHER; PAUL MILLER; KWAME HOLMAN