SPRINGFIELD, Ill. -- Federal prosecutors are asking an Illinois House impeachment committee not to delve into the criminal charges against Gov. Rod Blagojevich, warning that it could "significantly compromise" their investigation.
Members of the committee have promised to abide by any direction from prosecutors on what should be off limits, so the request from U.S. Attorney Patrick Fitzgerald means the panel won't question Blagojevich aides and campaign donors about possible crimes.
But the committee can still consider the fact that the Democratic governor has been charged with federal crimes. Members say they'll look at evidence outlined in the complaint against him -- including recordings of conversations in which he discussed how to benefit from appointing a new U.S. senator.
The committee is supposed to recommend whether the full House should consider impeaching Blagojevich, and it has also reviewed allegations that he abused his power by defying legislative rulings, handing jobs to donors and ignoring procedures for awarding leases and contracts.
The impeachment committee had asked Fitzgerald for guidance on what it could review without jeopardizing his criminal investigation.
In a response released Tuesday, Fitzgerald asked the committee not to interview a long list of people, including current and former Blagojevich aides who might be part of the investigation.
"Any inquiry into these topics, as well as the taking of testimony from present and former members of the governor's staff, could significantly compromise the ongoing criminal investigation," Fitzgerald wrote.
Blagojevich was arrested Dec. 9 on a variety of corruption charges. His arrest triggered an avalanche of demands for his resignation, and the House appointed a panel to consider impeachment.
Blagojevich maintains he is innocent and will stay in office to fight the accusations.
Committee members have said that if they can't pursue the criminal charges, then their fact-gathering work is largely done. The panel will meet again next week so that Blagojevich's lawyer can respond to earlier witnesses.
"I don't think the evidence in this case should call for impeachment," attorney Ed Genson said after Monday's hearing. "There are no facts here. All we have are inferences."
After his response, the committee will turn to considering whether there's enough evidence of misconduct to justify an impeachment vote by the full House.
If the House approved impeachment, the Senate would then conduct a trial to decide whether Blagojevich should be removed from office.