The Gallup Polls above graph is related to Obama Job Approval by "national adults, aged 18 and older" (including illegal immigrants and other people, who do not have rights to vote).
So, it'll be interesting to compare the above Gallup data with Rasmussen Report Polls, that counts "likely voters" only:
The polls data of August 18, 2009:
- Gallup Poll Obama Job Approval / Disappoval: 52 - 42 = +10%
- Rasmussen Obama Job Approval / Disappoval: 49 -50 = - 1%
