Hillary Clinton has spent much of the summer fending off questions about her private email account during her time as secretary of state. Bernie Sanders is gaining on her in the polls. And there's a looming possible challenge from sitting Vice President Joe Biden.
That's a far cry from the beginning of this campaign when she was seen as an almost inevitable Democratic nominee.
Now, she's trying to regroup and make the case before the very people who will choose that nominee — not voters, but her base: the party establishment.