Obama Trims Clinton's Lead

Sen. Barack Obama received endorsements today from a labor union and two Democratic superdelegates, as a poll showed he has cut Sen. Hillary Rodham Clinton's lead in Pennsylvania almost in half since mid-February as he strives to deny her a resounding victory in the state's presidential primary.

The Illinois senator peeled off an affiliate of the American Federation of State, County and Municipal Employees, which has endorsed Clinton. The Philadelphia-based local of the National Union of Hospital and Health Care Employees has about 16,000 members.

Its president, Henry Nicholas, announced the endorsement while introducing Obama at a meeting of the Pennsylvania AFL-CIO in Philadelphia.

Nicholas, who also is president of the 150,000-member national union and an AFSCME international vice president, said he took the step "because justice told me it was the right position to take."

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