That's a picture of part of the first article that's at the first page of Google results for "Barack Obama."
Did he mean that it wasn't politically possible for him to give them citizenship, that he didn't want to bear the brunt of criticism for it?
Who are the people who want to take responsibility for giving those immigrants citizenship?
How very comfortable the United States is, don't you think? Gosh, who has the time to implement the principles of democracy for everyone?