A new poll suggests Hillary Rodham Clinton is holding her lead over Barack Obama ahead of Pennsylvania's Democratic presidential primary.
With a week to go before the Keystone State primary, the Quinnipiac University poll shows Clinton leading by six points, with the support of 50 percent of those surveyed to Obama's 44 percent.
After three weeks of shifts, those percentages remain unchanged from a week earlier. However, the breakdown is different. The poll suggests Obama's support among the state's black voters has risen from 75 percent to 86 percent. Clinton's advantage among whites remains about the same, 57 percent to 37 percent for Obama.
Among the respondents, a quarter of Clinton's supporters say they'd vote for McCain in the general election if Obama were the nominee, while 19 percent of his backers say they'll vote for the Republican if the Democrats choose Clinton.