How Did the NYT Determine that the President Can't Do Much About the Economy?

In an article reporting the results of a new public opinion about President Obama and Congress, the NYT told readers:

"Two-thirds of the public say Mr. Obama has not made progress in fixing the economy, even though a majority of people concede the condition of the national economy is not something a president can do a lot about."

The public can only "concede" that the president cannot do much about the economy if it is in fact true that the president cannot do much about the economy. Of...