Undocumented have been advocating quite loudly for many years and have managed to bring big bucks to the table.
See this: http://www.nytimes.com/2014/11/15/us...y-changes.html
For legals it has been companies who have advocated and have invested millions. So interests of legal immigrants are really not a priority for Obama.
http://fivethirtyeight.com/datalab/w...tion-overhaul/
The above link gives numbers for folks who might get relief. It does not talk about legals.