She actually put a lot of effort into turning out voters in Florida's urban areas (especially South Florida), and she was also able to leverage her husband's ties to the state to her advantage. She did better than Obama in the urban areas of the state; it's the suburban/exurban areas (especially in and around I-4) that gave the state to Trump.
Would she have won the state without the Comey letter?
Imagine if she won Florida with the rest staying the same. Trump would still have won with 277 electoral votes then. But it would have blown anybody's mind in the summer and fall of 2016 to think about Clinton winning Florida while losing the election. It was actually believed that once the state is called for her early into the night, the whole thing is just over.
So much PTSD.
I remember Hillary releasing her “Tomorrow” ad the day before the election and believing, finally, that my ten years of understanding this woman’s great strengths would be validated in the mainstream. She’d be president, despite the hate from every side. The election would be over and Trump would be gone—a verified joke, defeated in a landslide.
Oh, how things turned.