Bush's apparent nominee to replace Gonzales at Justice seems to have given to precisely two candidates since retiring as a federal judge in June 2006: Rudy Giuliani (whose campaign he is officially advising)... and one Joseph Lieberman (via OpenSecrets.org):
MUKASEY, MICHAEL B - NEW YORK,NY 10021 - PATTERSON, BELNAP, ET AL/ATTORNEY - 9/28/2006 - $1,000 - Lieberman, Joe
MUKASEY, MICHAEL B MR - NEW YORK,NY 10021 - PATERSON BELKNAP WEBB & TYLER L.L.P - 6/19/2007 - $1,000 - Giuliani, Rudolph W
MUKASEY, MICHAEL B MR - NEW YORK,NY 10021 - PATERSON BELKNAP WEBB & TYLER L.L.P - 3/13/2007 - $200 - Giuliani, Rudolph W