Sen. Hillary Clinton 's presidential campaign is trying to figure out a way to feature former first daughter Chelsea on the campaign trail. "There have been lots of discussions," says an insider. Once protected from public scrutiny, the 27-year-old is seen as a "keen asset and symbol of family values," we're told. And, adds an adviser, a role is expected. "You always see the older kids. Gore, Kerry, Mondale all did it."