As former U.S. Attorney Bud Cummins has written, "Once the public detects partisanship in one important decision, they will follow the natural inclination to question every decision made, whether there is a connection or not."

Today, the nonpartisan congressional watchdog Democracy 21 sent a letter to Attorney General Alberto Gonzales and Deputy Attorney General Paul McNulty asking whether there had been political interference in the investigation and prosecution of Republican lobbyist Jack Abramoff.

"Based on issues that have been raised in the firing of the eight U.S Attorneys , we're all in a position to want some assurance that there hasn't been political interference in the case," Fred Wertheimer, Democracy 21's president, told me. "This still remains the worse congressional corruption scandal in 30 years. There are lesser players who have been convicted. But there are still big players here, including sitting and former members of Congress whose cases apparently have not yet been resolved. "

Citing concerns about the slow pace of the investigation and high turnover of prosecutors and supervisors working on the case, Wertheimer also asks Gonzales what resources the Justice Department has committed to the investigation.

You can read the letter here.