The Rasmussen Reports survey, released Friday, found that 43 percent approve of Obama's response. On the other hand, 35 percent say his response is "not aggressive enough."
The survey comes as the House on Friday approved a resolution supporting the dissidents in Iran by a 405 to 1 margin.
Some, particularly those on the right, have criticized Obama's response to this week's protests in Iran. Obama has said he is troubled by the violence that has broken out but has been careful to avoid "meddling" in Iran's election.
Interestingly, the Rasmussen survey found that a plurality - 43 percent - has followed the Iranian election "very closely." Another 36 percent said "somewhat closely."