The problem with a compromise bill is that it will be more liberal than originally planned by Bush. I don't even expect the RINOs in my state of NY will vote for what Kennedy's trying to dish out with McCain.
Bottom line: we end up with nothing the next four years except maybe the Real ID Act and a few other get tough bills.
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.