Teddy isn't capable of stopping the Republicans from introducing border-security bills. Only they can stop themselves from doing that, despite the fact that such bills are guaranteed to enjoy broad public support.
The Bush plan is the Kennedy plan just like the Bush education plan was the Kennedy plan. The Bush/Kennedy/McCain/Hillary amnisty is the one favored by the ruling political class.
Look at what they are all saying. They are all reading the same talking points.
Introducing a bill and passing a bill are different.