Only about one in three Americans can correctly identify President Obama as a Christian, according to a new Gallup poll.

Thirty-four percent identified Obama as Christian, Protestant or a related denomination--Baptist, Methodist or United Church of Christ. Eleven percent said wrongly that the president is Muslim, including 18 percent of Republicans, 12 percent of independents and 3 percent of Democrats.

Eight percent of Americans said Obama has no religion. Forty-four percent said they did not know.

Before becoming president, Obama attended the Trinity United Church of Christ in Chicago --where controversial pastor Jeremiah Wright was senior pastor until 2008. He has attended different Christian churches while in office.

In an earlier Pew poll, 57 percent of Americans correctly identified presumptive Republican presidential nominee's religion as Mormon. Eighteen percent said they would not vote for a well-qualified Mormon to be president.