Among the names floated Monday by administration officials are Homeland Security Secretary Michael Chertoff and White House anti-terrorism coordinator Frances Townsend. Former Deputy Attorney General Larry Thompson is a White House prospect. So is former solicitor general Theodore B. Olson, but sources were unsure whether he would want the job.

Republican sources also disclosed that it is now a virtual certainty that Deputy Attorney General Paul J. McNulty, whose incomplete and inaccurate congressional testimony about the prosecutors helped precipitate the crisis, will also resign shortly. Officials were debating whether Gonzales and McNulty should depart at the same time or whether McNulty should go a day or two after Gonzales. Still known as "The Judge" for his service on the Texas Supreme Court, Gonzales is one of the few remaining original Texans who came to Washington with President Bush.