WASHINGTON -

Former President George W. Bush says he has advice for his brother and former Florida Gov. Jeb Bush: "Run."

For president, that is.

In an interview aired Wednesday with ABC News, the former president says his brother would be, in his words, a "marvelous candidate."

Whether Jeb Bush ultimately does run, his brother added, is a "very personal decision."

Bush and his wife, Laura, granted ABC the interview ahead of Thursday's opening of the George W. Bush Presidential Center at Southern Methodist University.

Of a possible contest between his brother and Hillary Rodham Clinton, both of whom are likely attendees at Thursday's center dedication ceremony, Bush joked that the mere idea would "be a fantastic photo here."

He added: "It would certainly eclipse the museum and the center."