A very successful rethinking of what to write about.

From the standpoint of execution, this draft could use some tightening. You often use two words or phrases where either one would do but you don't want to make a choice. These are the sorts of editorial ruthlessness it will help you very much to cultivate.

On the substance of your statement it seems to me you can attain more clarity by starting with the political reasons that the two parties in Congress cannot actually deliver, and feel no political pressure to deliver, a working immigration system. If we being by reminding the reader precisely why nothing changes, we can ore easily convey the complexities of the subject without being immediately boxed in by the partisan fear structures.

How will immigrants rights organizations (which have attained through their organizing and intellectual contributions very great political influence) find their way to a breakthrough on behalf of their clients and constituents? Theirs are the single most important set of decisions that will be made over the next five to ten years, as everyone else remains constrained by their own political devices. You have well defined the why of your practice. You are right that the what will develop in your mind as you go. But these basic strategic realities will stay with you for years to come, and it's not too soon to start wrestling with them.