(CNN) - Highlights from the national exit polls show how key trends played out tonight.
On the Democratic side:
–Hillary Clinton carried white voters over Barack Obama, 52 to 43 percent. Obama carried black voters 82 to 16 percent. Clinton won Latinos 61 to 37 percent, and Clinton carried Asians 68 percent to 30 percent.
–Not surprisingly, the economy ranked as the top issue. Clinton had a slight edge with these voters, 50 percent to 46 percent. The war in Iraq was also an important issue for Democrats tonight, and those voters preferred Obama by 15 points. Clinton clearly benefits from the war becoming less a concern among Democratic voters.
–Clinton won 52-43 among those who didn't graduate from college. Obama beat Clinton 54-42 among those with a college degree.
–Clinton had a 5-point edge among Democrats, while Obama had a 21-point lead among independents.
On the Republican side:
–Romney beat McCain among conservatives, 42 percent to 30 percent. Huckabee won 21 percent of the conservative vote - though among Southern conservatives, the former Arkansas governor was the top choice, beating Romney 41 percent to 28 percent. The moderate vote overwhelmingly went for McCain over Romney, 52 to 24 percent.
–The top issue was the economy, and those voters favored McCain over Romney by 9 points - despite Romney's emphasis of his economic credentials.
–Nearly half of Republican voters said they were looking for a candidate who shared their values, and those voters favored Romney by 7 points. But McCain easily one among voters looking for a candidate who says what he believes, has the experience, and has the best chance to beat a Democrat next November.
Related: Watch Bill Schneider break down Super Tuesday by the issues
–CNN Senior Political Analyst Bill Schneider