A head to head comparison of the 2020 Primary gives us an idea of the break down of the voters.
Donald Trump received 1,162,984 (43%) votes beating Joe Biden who gained 1,077,375 (40%) and Bernie Sanders who gained 397,311 (15%) votes in Florida.
In the Primary, Trump won 56 counties in the 2-way match up. Joe Biden trailed behind Trump winning 11 counties. Sanders won no counties in Florida Primary.
Bernie Sanders vs Joe Biden
Joe Biden vs Donald Trump
Donald Trump vs Bernie Sanders
In a head to head match up on just the total number of votes, Joe Biden (73%) beats Bernie Sanders (27%). Donald Trump (75%) beats Bernie Sanders (25%). Donald Trump (52%) beats Joe Biden (48%).
These 10 counties play an important role in these primary elections. If a candidate, can get a sizable majority makes it almost irrelevant from the smaller counties , you win a massive number of counties with a decent margin.
Although Joe Biden won in Broward and Palm Beach, he could not achieve a victory since Donald Trump captured so many voters across most counties. This gave Donald Trump an upper hand in the state of Florida.