Les Kinsolving asked Tony Snow this question:

"With regard to your statement, 'border guards must obey the law, too,' [a Ramos/Compean reference] question, now how have so many millions of illegal aliens been able to enter our country if the president and his predecessor were seriously enforcing border and immigration laws?"

I invite everyone to put on their Bill Clinton Circuitousosity Caps[TM] and carefully parse Snow's response:

"Well, obviously there was a point where, in fact, it was not enforced seriously... That's why the president has committed more resources than anybody in history and has made further commitments about border security in the future, not only in terms of personnel, but also technology, and has made a - and, furthermore, has been far more aggressive than anybody ... in terms of what we call interior enforcement, going after employers in a way that nobody else has done..."

One will note that Snow is not going as far as Karl Rove, who admitted that six million illegal aliens entered the U.S. on Bush's watch. In fact - as long as we parse that in the correct, Clintonian fashion - it appears that he's blaming Clinton for everything, and then trying to portray Bush as trying to fix the problem.

Almost certainly while winking in the U.S. Chamber of Commerce's direction:

Snow continued that the message to employers is: "If you're hiring illegals and you're doing it all – if you're hiring illegals, we're going after you, and especially if you're doing it in a way that you have people who are here illegally who are also taking jobs that Americans might want to have," "Snow said.

The last is, of course, a departure from the frequent Bush quote that illegal aliens are "taking jobs Americans don't want", which was subsequently changed to them "doing jobs Americans aren't doing".

There's more regarding the Ramos/Compean case at the link, and Joseph Farah comments on that case in Presidents must obey law, too.