THE RACE: The presidential race for Democrats in Pennsylvania

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THE NUMBERS

Hillary Rodham Clinton, 51 percent

Barack Obama, 44 percent

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OF INTEREST:

The race for Tuesday’s primary has remained virtually unchanged in this poll since April 8, when a surge by Obama stopped. The latest poll shows Clinton continuing to run stronger among women, 57 percent to 38 percent, and voters 45 and older, 54 percent to 40 percent. Obama performed better among men, 53 percent to 42 percent, and younger voters, 57 percent to 41 percent.

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The poll by Quinnipiac University in Connecticut was conducted by telephone from Friday through Sunday. It involved interviews with 1,027 likely Pennsylvania Democratic voters. The margin of sampling error was plus or minus 3.1 percentage points.

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THE NUMBERS

Hillary Rodham Clinton, 52 percent

Barack Obama, 42 percent

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OF INTEREST:

On the eve of the Pennsylvania primary, only 4 percent of the state’s likely Democratic voters were still undecided and 2 percent refused to respond. Twenty percent said they would vote for the presumptive Republican nominee, Sen. John McCain of Arizona, if their choice fails to win the Democratic nomination. Another 20 percent said they were undecided about what they would do in November if their favorite does not become the nominee, and 4 percent said they would support independent Ralph Nader.

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The poll by Boston-based Suffolk University was conducted by telephone on Saturday and Sunday. It involved interviews with 600 likely Democratic voters in Pennsylvania. The margin of sampling error was plus or minus 4 percentage points.