If the republicans wish to remain relevant, they must recognise the changing demographic of the US population. To do otherwise would be the equivalent of Canute attempting to order back the tides - an exercise in futility.
http://www.dailykos.c...Is-Why-You-Lost-Again
Take a look at the link above. This is the reality, and it becomes more relevant with each passing year.
Obama and what he and his policies represent reached out to a wider electoral demographic. He was more relevant. The republicans were, in large part, architects of their own downfall. Their insistence on bringing religion into politics, with heated and sometimes offensive objections to equality and gay marriage, womens reproductive rights and abortion - these were the politics of the tea party far right christian fundamentalists, and it alienated large numbers of voters.
Romneys gaffes about the undeserving 47%, his signing of a commitment to never, regardless of circumstances, raise taxes, his refusal to allow minorities born of illegal immigrants to apply for citizenship, his hardline stance on hispanics "self deporting" -All of these measures alienated many centrist republicans and registered indepedent voters - these all contributed to a reluctance of moderates to vote for him. Thats why he lost the popular vote. Thats why he lost the electoral college, and thats why the republicans failed.
Look at the pictures from the respective election night parties and read the commentary. The republican party in Boston was almost exclusively white and male. Until they reach out to the wider electoral demographic, they will fail to gain the top position.
I think some voters will be influenced by the colour of a candidates skin, or their gender, or their sexual orientation, or their religious belief or lack of it, come to that. I think given the history of discrimination that blacks have experienced over the centuries, a positive bias in favour of a candidate from the same ethnicity is understandable, but until we get a black republican presidential candidate espousing fundamentalist social views vs a white democratic presidential candidate promoting liberal social views, we will never know for sure :)