More on Quinnipiac Pennsylvania Poll

26 percent of Clinton supporters would back McCain if Obama is the Democratic nominee; 19 percent of Obama supporters would back McCain if Clinton is the nominee.

Other results:

White voters: Clinton 57, Obama 37
Black voters: Obama 86, Clinton 6
Women: Clinton 54, Obama 40
Men: Obama 51, Clinton 43

Compared with last week's poll:

White voters: Clinton 56, Obama 38
Black voters: Obama 75, Clinton 17
Women: Clinton 54, Obama 41
Men: Obama 48, Clinton 44

For more on the poll, click here.