Although McCain, Kennedy, Cannon, amd Turner are credited with AgJobs, they didn't actually compose it.
They wrote it around a negotiated compromise between the growers and the unions. A small group of the largest growers, on behalf of Agribusiness and the AFL-CIO/United Farm Workers on behalf of the lawyers, civil rights groups, clergy, and ID groups. You may have seen the list of 400 groups supporting AgJobs that was released shortly after the bill was introduced.
I suspect that this new McCain-Kennedy has had a lot of imput from constituent groups. If it gets attached, look for an even larger list of supporting groups.
Those are more like lobby groups than constituents. I bet if they went to the man on the street and asked him what he thought of a massive amnesty for illegal aliens the reponse would be a 180 degrees different.
I'll tell you what's keeping more amnesties from sailing through: it's the success of Prop 200 in Arizona and conservative talk show hosts who are firing up the base on this issue.
Open borders Grover is full of it, we're not seeing much the next four years but a lot of hot air as far as guest worker programs go.