They made the difference for Clinton in New Jersey; she won women by 54-44 percent, losing men by about the same margin. But women were the bigger group, accounting for 58 percent of voters.
The sizable gender gap in Massachusetts showed more men supporting Obama and more women for Clinton. But Clinton won women by a slightly larger margin — and as in other states there were more of them: 58 percent of voters in Massachusetts were women, and that made the difference for Clinton.
Young voters, those under age 30, are 12 percent of voters; seniors account for a bigger share, 22 percent.
In the close Missouri Dem race, younger voters, as in earlier states, strongly supported Obama, by just under 2-1. But Clinton nearly doubled Obama's support among older voters , who made up over a quarter of voters, 58-32 percent.
There was a massive generation gap in New Jersey, with Obama winning young voters by 30 points, Clinton winning seniors by the same margin.
In Alabama, Clinton won seniors by a substantial margin, but Obama won every other age group. Half of Alabama Democrats were looking for a candidate who would bring change, and Obama dominated this group, garnering roughly seven in ten of their votes.
Barack Obama easily won his home state by more than 2-1 over Hillary Clinton, claiming substantial majorities of virtually every major voting group in the Illinois Democratic primary. Preliminary exit polling results suggest Obama claimed six in 10 votes cast by white women, who have been Clinton's most solid voting group in the primaries, and a slightly larger proportion of white men.
Illinois Democratic primary preliminary results show Clinton with 38 percent of white women, Obama with 61.
Obama also narrowly defeated Clinton among Hispanic voters, winning Hispanic men but losing Hispanic women to Clinton. Nearly all black voters -- nine in 10 -- voted for Obama.
In Massachusetts, Mitt Romney rode a wave of popularity, generating strong support across the board in his home state. Nearly three-quarters of voters expressed a positive opinion of the former governor.
Opinion of Romney was 74 percent favorable, 25 percent unfavorable.
Romney led John McCain by a wide margin among those who considered the economy their top concern. The only issue voters won by McCain are those most concerned about the war in Iraq. McCain did well — 48 percent to Romney's 42 percent — among the moderates who made up about four in 10 voters. But even more — 52 percent — considered themselves conservative and Romney won them by a fourfold margin.
Additionally, Mike Huckabee won big in his home state over John McCain, by more than 2-1. Nearly nine in ten voters have a favorable opinion of the former governor, and he nearly triples McCain's support among them.
Clinton took Arkansas in the Democratic race. Both Clinton and her husband remain hugely popular among Democrats in Arkansas — paving her way.
She also won a comfortable victory in her home state, beating Barack Obama on the strength of strong support among women as well as claiming virtually every vote cast by those who most valued "experience" in a candidate.