From the latest Economist poll:

Barack Obama’s approval rating has hit a new low (48%) in our latest poll. Americans are increasingly questioning the president’s handling of the wars in Iraq (44% approve, down from 46% last week) and Afghanistan (42% approve, down from 47% last week). But the economy is still the country’s most important issue—and it is the issue on which Mr Obama gets his best ratings (45% approve). Still, Americans aren’t convinced that it’s the president’s stimulus package that is making the difference. Only 24% say the stimulus package is working, and only another 9% think the plan will eventually work.