Mitt Romney isn't sure yet:

I think that as a candidate, to my understanding that he's still deciding what his position on immigration is, so I can't talk about what his proposal is going to be because I don't know what Romney exactly — he's talked about different issues, and what we saw in the Republican primary is that there's a diverse opinion on how to deal with immigration. I can't talk about something that I don't know what his position is.

I think this decision comes down to the eternal question that haunts every Republican candidate. At some point, you have to look in the mirror and squarely ask yourself: Do you want to alienate 97% of the Latino vote, or just 95% of the Latino vote? I wish Romney the best of luck in his decision.