An examination of the exit polls sheds light on how a president facing unemployment near 8 percent, debt topping $16 trillion and mounting questions over the Libya terror attack was able to win a second term in office.

Obama’s win Tuesday night came from a strong showing among core Democratic constituencies, being more likeable than his opponent, and an economy that voters felt is doing well-enough to give him another four years. Also, the president’s response to Hurricane Sandy in the final days of the campaign was an important factor to many voters.

Obama’s key groups made the difference — both in their makeup of the electorate and, for the most part, their strength of support for him.

Non-whites made up 28 percent of the electorate, up a bit from 27 percent in 2008. This group largely backed Obama: 71 percent of Hispanics (it was 67 percent last time), and 93 percent of blacks (down a touch from 95 percent).

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