"Front-runner" can be a tenuous word. But when it comes to at least one group, Hillary Clinton is far and away the leader — the Democratic Party establishment.
There's no better measure of that establishment than unpledged party leaders and elected official delegates, better known as "superdelegates."
Among this group, Clinton leads Vermont Sen. Bernie Sanders 359 to 8, according to an AP survey of the group that will help elect the nominee at the Democratic National Convention in July. Former Maryland Gov. Martin O'Malley has two people supporting him from this group.