President Obama’s win today came from of a strong showing among core Democratic constituencies, being more likeable than his opponent, and an economy that voters felt is doing well-enough to keep him in the White House.  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).

Republican challenger Mitt Romney won among white voters by 20 percentage points.  That’s up from John McCain’s edge of +12 points in 2008.  In addition, the share of votes cast by whites was lower (72 percent) than it has been going back to at least 1992.

Young voters were important to giving Obama his first term.  Voters under age 30 showed up again this time:  They represented 19 percent of all voters, one point higher than the 18 percent in 2008.  Even so, they didn’t back him as strongly this time: 60 percent — down six points.

Read more: Fox News