Former President Bill Clinton jokes that he's become so close to the Bushes that he's become "the black sheep son."
Clinton was reunited with his predecessor and successor once again Thursday during the dedication of the George W. Bush Presidential Center.
During a speech at the dedication on the campus of Southern Methodist University, Clinton said Bush had a beautiful library and that his institute's work was inspiring.
Clinton also noted that Bush had beaten him to becoming a grandfather and joked with him about his newfound hobby of painting.
Clinton and another former Democratic president, Jimmy Carter, both noted Bush's humanitarian causes. Wearing dark sunglasses, Carter credited Bush for helping broker a peace treaty in Sudan after he took office.