Barack Obama approaches his nomination for a second term with the lowest pre-convention personal popularity of an incumbent president in ABC News/Washington Post polls since the 1980s. He’s also at his lowest of the year among registered voters, with trouble among women.

Just 47 percent of registered voters in the latest ABC News/Washington Post poll see Obama favorably overall, down 7 percentage points from his recent peak in April, while 49 percent rate him unfavorably. He’s numerically underwater in this group for the first time since February.

http://abcnews.go.com/blogs/politics/2012/09/obamas-popularity-dips-underwater-for-romney-a-faint-favorability-bounce/