Proof for the time being.
Check it out:

While the Obama Justice Department mounts a legal challenge against Florida for purging ineligible voters from its rolls, a television news station broadcasts an unbelievable segment that proves non U.S. citizens living in the Sunshine State vote regularly in elections.

The investigative piece was aired this week by an NBC affiliate in southwest Florida that actually tracked down and interviewed non U.S. citizens who are registered to vote and have cast ballots in numerous elections. The segment focused on Lee County, which has a population of about 620,000 and Collier County with a population of around 322,000. The reporter spent about two months digging around the voter rolls in the two counties and the discoveries are dumbfounding.