I'm assuming she was in this country legally to begin with.
And why should you assume that, absent a statement to that effect from the White House?
I am increasingly applying the "trust but verify" axiom to the Bush administration.
I find myself wondering if this woman got preference in the legalization process. If she was illegal at the time Bush hired her--or had her hired for him--then he lied to the public when he responded negatively when questioned whether he has ever hired an illegal.