[Lower Deck]

Democrats in the critical must-win state of Florida are panicking at the lead Republicans have taken in in-person early voting in Miami-Dade County, a usually reliable blue bastion.

How can they be sure that all the Republicans are voting for Trump or all the Democrats are voting for Biden?

[SmokingJoe]

They are not. But going by previous elections, and exit polls, most Dems vote for the Dem candidates and most Republicans vote for the Republican candidates.