What distinguished [Mr. McCain's] posse from Mr. Obama’s throng was not just its age but its demographic monotony: all white and nearly all male.

For Mr. McCain, this albatross may be harder to shake than George W. Bush and Iraq, particularly in a faceoff with Mr. Obama. When Mr. McCain jokingly invoked the Obama slogan “I am fired up and ready to go” in his speech Tuesday night, it was as cringe-inducing as the white covers of R & B songs in the 1950s — or Mitt Romney’s stab at communing with his inner hip-hop on Martin Luther King’s birthday. Trapped in an archaic black-and-white newsreel, the G.O.P. looks more like a nostalgic relic than a national political party in contemporary America. A cultural sea change has passed it by.