AIKEN, S.C. - Bill Clinton was already working the crowd with a vociferous appeal to vote for his wife when the dozens of people jostling to get inside the auditorium provoked a campaign worker to cry out, "Adults should not be acting this way!" Coincidentally, Clinton's sharp- elbowed advocacy leading up to Saturday's South Carolina primary is prompting some pundits and fellow Democrats to voice a similar sentiment: Should a former president be acting this way? Several prominent Democrats say no. In recent days, they have publicly warned that he is hurting his party and his own status as elder...