Washington (CNN) - President Obama's approval rating fell in all 50 states (and the District of Columbia) from 2009 to 2010, according to a new poll. A closer look at the president's state-by-state popularity may provide a good sense of which states will be included in the "swing-states" category in the 2012 presidential campaign.
The Gallup survey released Wednesday shows many of the swing states that Obama won in 2008 saw considerable drops in his popularity in 2010 – in some states to levels well below 50 percent. His approval rating in New Hampshire dropped 13.4 percentage points to 41.3 percent. In Pennsylvania and Virginia, the figures both dropped by 11.1 percent to 46.3 percent and 46.6 percent, respectively. Obama's approval in North Carolina dropped 8.5 percentage points to 46.9 percent and his support in Iowa fell by 10.2 percentage points to 47.5 percent. Arizona and Missouri, also considered presidential swing states that Obama lost in 2008, were among the other states that saw the greatest drop.
In general Obama fared better in typically Democratic-leaning states and fared worse in typically Republican-leaning states. Delaware, Hawaii, Nebraska and the District of Columbia were among those where his support saw the least change.
Residents of Hawaii gave Obama the highest average in 2010 with 66 percent approval, surpassed only by the 84 percent he received in Washington, D.C. Obama's lowest average state approval rating in 2010 was in Wyoming, with 28 percent.
Overall, residents of 20 states gave Obama an approval rating within three percentage points of his national average, which is currently between 43.8 percent and 49.8 percent. Twelve states plus Washington, D.C. had approval ratings above the average and 18 states had approval ratings below the range.
The averages are based on data from the Gallup Daily tracking interviews conducted from January through December 2010 of 179,503 adults, with a margin of error of plus or minus one percentage point.
– CNN Deputy Political Director Paul Steinhauser contributed to this report