What's interesting is that this is an LV screen model, as opposed to an RV model.
Although Florida is an extremely tricky State to poll, because of a wide range of Metro Areas, fast changing population and demographic changes (Much like Texas), we are starting to see some interesting numbers in recent polls contrary to political conventional wisdom (CW).
I wonder to what extent the "Medicare for All" part of his platform is resonating among Senior Anglo swing voters, in a State with a high % of retirees that are quite comfortable with Medicare???
https://www.aarp.org/politics-society/government-elections/info-2018/aarp-politico-florida-poll.html
The "Medicare for All" would probably have more of an impact with the 50-64 year old voter--where health insurance premiums are ridiculous with high deductibles, narrow networks, and poor coverage. To create this option may be resonating with these voters--by getting access to Medicare, they would effectively get a larger access to doctors and hospitals (over 90% of doctors participate in Medicare) and have a higher level of coverage than what is available with private insurance HMOs.