White House press secretary Sarah Sanders on Wednesday dismissed out of hand a charge leveled by former chief strategist Steve Bannon that a meeting between President Trump's son and Russians was "treasonous."

"That is a ridiculous accusation," Sanders told reporters on Wednesday when asked about Bannon's comments, which emerged in excerpts of a forthcoming book about the presidency.

Sanders noted that months before Bannon criticized Donald Trump Jr.'s decision to meet with a Russian lawyer during the campaign, he was slamming Russian collusion allegations as false.

"If anybody's been inconsistent, it's been him. It certainly hasn't been the president or this administration," Sanders said.

The press secretary said President Trump and Bannon have not spoken since early December.

Trump lashed out at his former chief strategist on Wednesday, claiming the Breitbart News chief "lost his mind."