New Fox News/Opinion Dynamics poll (June 17-18) shows Obama leading McCain by four:

Obama 45
McCain 41
Undecided 16

Overall, Obama leads McCain by 4.2% in the RCP National Average.

Highlights: Clinton supporters break 68% for Obama, 17% for McCain, and 15% undecided. An Obama-Clinton ticket wins against a McCain-Romney ticket by seven points, 48 to 41. Bush's job approval is at an all time low in the Fox poll at 29%.