President Donald Trump has removed his own influential chief strategist Steve Bannon from the National Security Council.
It reversed a controversial decision early in his administration to give Mr Bannon access to the group's high-level foreign policy meetings and was seen as a victory for Lieutenant General H.R McMaster, Mr Trump's national security adviser, in a behind-the-scenes power struggle.
Mr Trump added Rick Perry to the National Security Council. As Energy Secretary Mr Perry is responsible for the US nuclear weapons programme.
The move came as Mr Trump accused Susan Rice, President Barack Obama's former national security adviser, of "committing a crime" by seeking the identities of his associates who had appeared incidentally in intelligence reports.
When US citizens appear in surveillance of foreign officials their identities are "masked" in intelligence reports but Ms Rice could request their unmasking for national security reasons.
Asked if he thought Ms Rice had done something criminal, Mr Trump told the New York Times: "Do I think? Yes, I think. I think it’s going to be the biggest story. It’s such an important story for our country and the world. It is one of the big stories of our time.”
Ms Rice denied doing anything wrong. She said: "The allegation is that somehow the Obama administration officials utilised intelligence for political purposes. That’s absolutely false"
Mr Bannon's removal from the National Security Council emerged in a new memo about the composition of the body that was published in the Federal Register.
The memo no longer lists Mr Bannon as a member of the principals committee, a group of high-ranking officials that convene to discuss pressing national security issues.
According to the document the Director of National Intelligence and the Chairman of the Joint Chiefs of Staff have been put back on the principal's committee, having previously been removed.
Mr Bannon's role had led to criticism from those who said it was inappropriate for a political adviser to play such a key role on national security matters.
A senior White House official said Mr Bannon was no longer needed after the departure of Michael Flynn, Mr Trump's first national security adviser.
Allies of Mr Bannon suggested he had only been on the National Security Council to "babysit" Mr Flynn, which no longer needed doing.
Mr Flynn was fired in February over his contacts with Russian ambassador Sergei Kisylak. The official said Mr Bannon had originally been placed on the National Security Council as a check on Mr Flynn.
Mr Bannon had only ever attended one of the National security Council's regular meetings.