Definition: In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
Input: The DREAM Act was written by members of both parties. When it came up for a vote a year and a half ago, Republicans in Congress blocked it. The bill hadnt changed. ... The only thing that had changed was politics.

immigration