Implications of Janet Napolitano's appointment as Head of Homeland Security? ?

Please focus on possible changes in immigration policy and practice compared to Bush's Head of the same agency, Michael Chertoff. How do you feel if there are changes and Why ?
Update: She signed some pretty drastic state legislation directed against non residents, which kind of upset me. She claims that she did it to forestall tougher legislation. Reminds me of Pontius Pilate,
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