House Minority Leader Nancy Pelosi (D-Calif.) is holding back some information on Republican Newt Gingrich that could detract from his presidential campaign, according to a report published Monday.

“One of these days we’ll have a conversation about Newt Gingrich,” Pelosi told Talking Points Memo. “When the time is right. … I know a lot about him. I served on the investigative committee that investigated him, four of us locked in a room in an undisclosed location for a year. A thousand pages of his stuff.”

Gingrich, who served as Speaker of the House, worked with Pelosi in Congress from 1987 to 1999. Pelosi also served on the ethics committee that investigated Gingrich for tax cheating and campaign finance violations in the late ’90s.

Gingrich reacted to Pelosi’s comments by thanking her for an “early Christmas gift.”

He also said Pelosi would be violating House rules and abusing the ethics process if she disclosed anything from the ethics investigation.

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