FLORIDA (REUTERS) - Voters in Florida's Miami-Dade county were lining up even before dawn on Monday (Oct 24) to cast their ballots.

Like voters across the country, they were heeding warnings from both presidential candidates not to take anything for granted this election, and to take advantage of the early voting exercise, which had just started.

Democratic vice-presidential candidate Tim Kaine was not taking anything for granted, either.

He was in the crucial battleground state, telling Miami supporters that if Democrat Hillary Clinton wins Florida, she would clinch the presidency.

In St Augustine, Republican White House hopeful Donald Trump was sending home the same message to Floridians.

Florida has some 13 million registered voters, and well over a million of them have already mailed in their ballots.

Now, many more voters across the country hope to get a head start, with only two weeks left until election night.