It=letting them state their positions clearly if they run.
http://www.ontheissues.org/governor/Scott_Walker_Immigration.htm
And, this....Perry’s “Have a heart” statement, made during his last Presidential run:
PERRY: If you say that we should not educate children who have come into our state for no other reason than they’ve been brought there by no fault of their own, I don’t think you have a heart. We need to be educating these children, because they will become a drag on our society. I think that’s what Texans wanted to do. Out of 181 members of the Texas legislature, when this issue came up, only four dissenting votes. This was a state issue. Texans voted on it. And I still support it greatly.