As many as one in five Americans think wrongly that President Barack Obama is a Muslim, indicating a significant increase in the number of such people since his inauguration in January 2009. At the same time, the number of people who now correctly identify Obama as a Christian has dropped to 34 percent, down from nearly half when he took office, according to new Pew Research Centre survey.

Among those who say Obama is a Muslim, 60 per cent say they learned about his religion from the media, suggesting that their opinions are fuelled by misinformation, says the poll.

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