Senator Obama and Senator Clinton got together on July 10 for breakfast.
The two former rivals attended a Women for Obama breakfast fundraiser in New York.
Obama praised Clinton, saying they're shattering barriers together.
Clinton says the two of them joining forces is critical for the future of the Democratic Party, and for taking back the White House.
She expressed her commitment to his candidacy.
"I could not be prouder to have this opportunity to have this in front of so many of my friends and supporters," said Clinton.
"To express my confidence in his candidacy and my commitment to ensuring that he will take the oath of office come next January 2009."
Senator Clinton asked her supporters to back Obama so issues they care about can finally be addressed.