And you see, I don’t see this as a “diss” at all, but instead, it’s Bush’s way of making sure he doesn’t distract from the President.

In a statement, David Sherzer, spokesman for the ex-president, said Bush “appreciated the invite, but has chosen in his post-presidency to remain largely out of the spotlight. He continues to celebrate with all Americans this important victory in the war on terror.”
…

“He and his family … have an old-fashioned view, that we only have one president at a time,” added Gergen, who has served in Democratic and Republican administrations. “I think this is quite genuine on the part of President Bush.”