Interesting:

A new study shows Latinos have soured considerably on illegal immigration in the last three years.
In 2007, 50percent of Latinos surveyed told the Pew Hispanic Center that the growing number of illegal immigrants was a positive force for the existing Latino population. In a Pew survey released Thursday, that number had plummeted to 29percent.
Thirty-one percent said illegal immigration had a negative effect, and 20percent said it had no effect.
While the wording of the question changed slightly in 2010 – striking the phrase “growing number” to reflect studies that show illegal immigration declining – several local advocates on different sides of the issue called the change in perception unsurprising.