Well, as I pointed out in my article, she has less to lose than previously, but some unknown quantity to gain.
The Latino vote is quickly becoming a wash for the Democrats, so they need to go elsewhere to find some votes. They will use the immigration issue as a means of peeling off some conservative Bush-supporting Democrats and some single-issue Republicans from the GOP, especially in light red states.
They will also use this as a labor and environmental issue.
This is the first step/compromise in forming an alliance between the left and the right against the middle.