That's the result of a poll from the South Florida Sun-Sentinel:

...The poll, conducted last week by Maryland-based Research 2000, surveyed 600 likely voters in Florida. The poll has a margin of error of plus or minus 4 percentage points. The poll found that fewer than four in 10 likely voters in the state think immigration helps the United States...

...Hispanics, who made up 15 percent of the respondents, were no more supportive of pro-immigration changes than other groups polled. Only two in 10 Hispanics favored a law allowing undocumented immigrants to work legally in the country. Only two in 10 favored issuing driver's licenses to undocumented immigrants. And only 38 percent of Florida's Hispanics who are likely voters said they thought immigration helped the United States...

See also Field Poll: 62% of Californians oppose driver's licenses for illegal aliens.