M'GOVERN DENIES RIFTS ARE MAJOR
September 2: (McGovern Campaign) Sen McGovern, on Sept 1, in response to L O'Brien's charge that 'everything needs tightening up' in McGovern's orgn, agrees there are problems, but asserts they are being worked out; says he has no intention of changing O'Brien's role; O'Brien, recently named natl campaign chmn, is seen as intermediary with regular party elements; McGovern says G Hart will continue to direct day-to-day operations; Hart, at news conf, holds O'Brien is number 1 in orgn, he is number 2; asserts he and O'Brien have agreed on necessity for better coordination of orgn, but that field orgns will remain 'pillar of the campaign,' despite criticism of decentralization of offices; F Mankiewicz defines his position as 'outside man' while Hart is 'inside man' in orgn; McGovern has scheduled series of meetings with running mate S Shriver, apparently to clear up some issues on which Shriver has taken stands at variance with those of McGovern; illus of McGovern and Shriver at impromptu news conf