NATIONAL BRIEFING / WASHINGTON, D.C.

A federal grand jury investigating the 2006 firings of nine U.S. attorneys has subpoenaed records of former Sen. Pete V. Domenici (R-N.M.), and prosecutors are preparing to interview an ex-aide to President Bush’s political advisor, Karl Rove.

Career federal prosecutor Nora R. Dannehy is looking into whether former Atty. Gen. Alberto R. Gonzales, other Bush administration officials or Republicans in Congress should face criminal charges in the dismissals. An earlier Justice Department review concluded that politics played a role in at least four of the firings.