Huckabee is a big illegal alien supporter. That is a big downside.
IMHO, Huckabee's position on illegal immigration seems to me to be more or less the same as all of the other leading Republican candidates, at least based on what I've read on their websites, (Tancredo and Hunter excepted, of course, since they are out front on this issue). The other candidates all say they want to enforce the border and oppose amnesty, but don't discuss the bigger issue of what they would do regarding the 12 to 20 million people already living in the U.S. illegally.