A new poll (pdf) from the Public Religion Research Institute shows only 40% of Americans correctly identifying Mitt Romney's Mormonism.
46% don't know what his religious beliefs are, but 72% say the Mormon faith is either somewhat or very different from their own.
Barack Obama, meanwhile, faces some incorrect perceptions. 18% think he's Muslim, while just 34% identify him as "Protestant" or "Christian".
When the two are paired up, Obama beats Romney in a hypothetical general election, 44%-36%.