Had I been on the Romney team, I would have prepped the candidate by having him memorize some form of this answer:
Regardless of how you feel about the Dream Act or the situation in which young illegal immigrants find themselves, anyone who values the Constitution and our laws has to be very disturbed by the president's actions. They're clearly unconstitutional. Presidents don't get to ignore laws they don't like, nor do they get to write their own laws according to political correctness or their own need to buy votes from certain constituencies. Congress makes the laws and Congress elected not to pass the Dream Act. That decision cannot just be ignored by the president.With an answer like that Romney doesn't have to commit for or against the policy, but can base his objection to the way it was handled. The other benefit to this approach is the fact it would tick off the press since they wouldn't be able to pin him down.
If I become president I will have no choice but to reverse Mr. Obama's unconstitutional move, though Congress should tackle that long before January. They should not sit by while their authority is usurped by the White House.
Romney people - call me. You need my help.