Zogby International's tracking poll for Sunday shows Obama building on his strong advancement in the last few days leading into Tuesday's primaries.
Obama's lead in California has widened slightly, and he now has a four point lead over Clinton among white male voters. Obama is carrying the California black vote by 3-1, and Hispanic voters are choosing Clinton by a 55% to 36% margin.
Obama leapt ahead of Clinton in Missouri on Sunday, picking up four points while Clinton dropped two. Obama holds a 4-1 advantage among black voters, and Clinton's lead among white voters has dropped to a 48% to 40% margin.
Obama pulled up to a dead-even tie in New Jersey and is showing continued support among independents, who favor him 48% to 34%.. Clinton holds a strong lead among women voters; mirrored by Obama's support among men.
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