A former aide to Tom Delay pleaded guilty Monday to conspiring with Republican lobbyist Jack Abramoff to bribe government officials, including a congressman, and bilk millions of dollars from Native American tribes. The aide–Michael Scanlon–agreed to pay back more than $19 million and to work with government investigators. He faces up to five years in jail. The Washington Post reports the Abramoff probe could expand greatly. Investigators are looking at half a dozen members of Congress, current and former senior Hill aides, a former deputy secretary of the interior, and Abramoff’s former lobbying colleagues.