Yglesias hits this one square on the head:
Mitt Romney, chatting on the phone with donors to his campaign, “attributed his rival’s victory to ‘the gifts’ the administration had given to blacks, Hispanics and young voters during Obama’s first term.”
That’s a funny way of phrasing it, but I feel like Romney basically has this right. Obama offered policies that he believed would make people’s lives better, and the people who deemed those promises credible tended to vote for Obama.
It ain’t rocket science. His advice to Republicans:
In the longer term you need to make the “people think people will be better off in concrete ways if you win” thing work.