That a former VP candidate from the Democratic Party, a sitting non-GOP senator, would endorse John McCain? That wasn't big news, and was not reported as significant of anything.
That Colin Powell would endorse 0bama? That will be big, big news, and will be reported as thunderously significant.
Perspective: commenter "Blam" at FreeRepublic wryly remarks: "That’s it...Obama has the Black vote locked up."