Retired pediatric neurosurgeon Dr. Benjamin Carson charged on Friday that mainstream African-American organizations are silent when black Republicans or conservatives are criticized.

“Where are the black liberals when atrocities occur?” Carson, who is weighing a GOP candidacy for the White House in 2016, asked talk-show host Roland Martin on “NewsOne Now” on the black cable network channel TV One. “Organizations like the NAACP …, do you ever see them coming out in support of a conservative black person?”

Carson noted that former Secretary of State Condoleezza Rice has been the subject of protests by student and faculty at Rutgers University since she was selected as commencement speaker in February. They charge that Rice supported torture and lied about weapons of mass destruction in Iraq.

Carson, 62, who retired last summer as chief of pediatric neurosurgery at the Johns Hopkins University in Baltimore, said that the protests have occurred simply because Rice “was a conservative.”