It's unclear whether these attacks are the cause of Mack's low favorability numbers, but they must be troubling for his campaign nevertheless: only 27 percent of Florida voters have a favorable opinion of the candidate, compared to 45 percent who have an unfavorable opinion. That marks only a slight increase from the July poll in the number of voters who view him favorably, and a 10-percentage-point increase in his unfavorability numbers.
About a quarter of voters are still unsure about either candidate, indicating Mack could clear his name in the court of public opinion somewhat before November, or possibly negatively define the relatively unknown Nelson. But only 17 percent of voters say they're still undecided, meaning a tough battle for that small sliver is ahead in the state.
The poll was conducted among 1,548 likely Florida voters from Aug. 31 to Sept. 2, and has a margin of error of 2.5 percentage points.