Did RFK predict Obama?

"In 1968, Bobby Kennedy said we would have a black president in 40 years. None of us were willing to take a bet on that," Lowery said. "Tonight I am in awe, not so much by what he said but what he [Obama] is doing—accepting the nomination for president."

This per Rev. Joseph Lowry, president emeritus of the SCLC, the organization founded by Martin Luther King, per this article.