Define "support illegal immigration." That's kind of broad for a topic with many different opinions on how to approach it.
But there is this...
Six in 10 Hispanics say the Democratic Party’s overall position on immigration is in line with their own, while only 20 percent cite the GOP.
http://www.washingtonpost.com/politics/poll-finds-hispanic-disapproval-of-trump-rhetoric-on-illegal-immigrants/2015/07/15/a39f53fc-2b05-11e5-a250-42bd812efc09_story.html