A new poll shows President Barack Obama favored by at least 50% of likely voters in the key battleground states of Pennsylvania, Florida and Ohio.
A Quinnipiac University survey shows Obama with a lead of 11 percentage points, 53% to 42%, over presumed Republican nominee Mitt Romney in Pennsylvania.
The president leads his GOP challenger by a margin of 51% to 45% in Florida and 50% to 44% in Ohio.
No one has won the White House since 1960 without winning at least two of the states.
Quinnipiac surveyed 1,177 like voters between July 24 and July 30 in Florida, 1,193 in Ohio and 1,168 in Pennsylvania. The margin of error in the Florida and Pennsylvania surveys was 2.9 percentage points and was 2.8 percentage points in Ohio.