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President Barack Obama has had a turbulent time in office with wrangling over healthcare reform, high unemployment, a huge oil leak in the Gulf of Mexico and a "shellacking" in the mid-term elections.

Look at the graph below to see how his popularity has changed since he took office.

The approval ratings were calculated by Gallup, Pew and ABC/Washington Post and collated by where you can find full data from these and other polls.

GALLUP: Asks about 1,500 adults whether they approve of the job Barack Obama is doing as president. Sampling error: +or-2%.

PEW RESEARCH CENTER: Asks between 1,000 and 2,000 adults: "Do you approve or disapprove of the way Barack Obama is handling his job as president?" Sampling error +or-3.5%.

ABC NEWS/WASHINGTON POST: Asks about 1,000 adults: "Do you approve or disapprove of the way Barack Obama is handling his job as president?" Sampling error +or-3%.