Dr. Ben Carson, the retired Johns Hopkins neurosurgeon who is considering a run for president in 2016, apologized Thursday for lifting portions of his 2012 book, "America the Beautiful," without offering credit.
The apology came a day after the news site BuzzFeed pointed to instances in which Carson copied wholesale sections the book from an anti-socialism website and several conservative historians.
"I attempted to appropriately cite and acknowledge all sources in 'America the Beautiful,' but inadvertently missed some. I apologize, and I am working with my editors to rectify the situation," Carson said in statement distributed by his literary agent Sealy Yates.
At least one of the authors Carson relied on, Bill Federer, said in a statement he did not believe his work was plagiarized. "With 16 acknowledgments and citations, it is clear that Dr. Ben Carson made significant effort to make correct attribution," he said.
Carson retired from Hopkins in 2013 after a celebrated career in pediatric neurosurgery. Talk of a potential presidential campaign began to swirl after he delivered a fiery address at the National Prayer Breakfast in Washington in February.
The Florida resident has said he will make a decision about whether to seek the GOP nomination by this spring.