Convicted lobbyist Jack Abramoff is scheduled to report to federal prison tomorrow, over the objections of federal prosecutors who say they still need his help to pursue leads on officials he allegedly bribed. Sources close to the investigation say Abramoff has provided information on his dealings with and campaign contributions and gifts to "dozens of members of Congress and staff," including what Abramoff has reportedly described as "six to eight seriously corrupt Democratic senators." The sources say Abramoff was about to provide information about Bush administration officials, including Karl Rove, "accepting things of value" from Abramoff. THE BLOTTER RECOMMENDS Follow the Bouncing Bribe Scandal: Keeping Tabs on the Abramoff Lobbying Investigation Photos Abramoff Scandal Spins Out of Control Click Here to Check Out Who’s Blowing Hot, Cool and Smoke on the Brian Ross Page Rove has denied any wrongdoing in his dealings with Abramoff. But the lobbyist visited the White House at least seven times, according to Secret Service logs obtained by Judicial Watch. Abramoff has been meeting almost daily in secret locations around Washington with Justice Department investigators who are examining thousands of e-mails and documents, according to sources close to the investigation. The convicted lobbyist was spotted in downtown Washington, D.C., yesterday, carrying a computer laptop case. But the prosecutors’ easy access to Abramoff has now ended. After granting several delays, the federal judge in Florida, who sentenced Abramoff to six years for fraud in a casino boat gambling scheme, has ordered him to report to prison tomorrow. ABC News has learned that the court has granted a request from prosecutors that Abramoff be incarcerated at the closest prison to Washington, D.C., the Federal Correction Institute in Cumberland, Md., where Abramoff is expected to report tomorrow.