Van Jones is the Obama administration's "green jobs czar," but his background is causing concern among some.
Critics say Jones has called himself a Communist in the past and his views regarding 9/11 have some calling for his termination.
Top Obama advisor Valerie Jarrett has said the administration team was "delighted" to recruit Jones to the White house.
Prior to his appointment as green jobs czar, Jones had a long track record of controversial statements and associations.
During the 1990s, Jones belonged to a self-described "revolutionary" group called "Storm." The group, based in California, was committed to Marxism.
Back then, Jones accused San Francisco police of "killing black people."
More recently in 2008, Jones railed against "white polluters and white environmentalists" and said that a green economy "could become an engine for transforming" American society.
This February, he had some choice words when asked a question about Republicans in Congress.
"How were Republicans able to push things through when they had less than 60 senators, but somehow we can't?" he asked.
Then there are Jones' views on 9/11. His group led a vigil the day after the attacks that slammed "U.S. imperialism."
Jones signed a 2004 petition that called for an investigation into whether the Bush administration was involved in the 9/11 attacks. He released a statement last night addressing that petition:
"Some in the news media have reported on past statements I made before I joined the administration, some of which were made years ago," he wrote.
"If I have offended anyone with statements I made in the past, I apologize. As for the petition that was circulated today, I do not agree with this statement and it certainly does not reflect my views now or ever."
An Obama administration source told CBN News that Jones "did not carefully review the language" in that 2004 petition.
News surfaced Thursday, however, that Jones has been involved in the so-called 9/11 "Truther Movement" for some time.
He was on the organizing committee of a 2002 march that also called for an investigation into the Bush administration's role in the attacks.