It sounds like Rubio and the GOP are putting their foot down if you do a full read with the update. The fight is not over by a long shot.
Rubio believes in 99% of this bill. He might come out on this just to keep his 2016 aspirations alive somehow but the devil is in the details and he might back down in the end because he wants amnesty and he doesn’t want thi chance to blowup on one particular item