A look into how the Iowa Caucuses work

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All eyes are on the state of Iowa in the United States, as it's set to kick-off the race to nominate candidates for the 2020 presidential election.

Monday's contest is the first in the country - with Republicans and Democrats deciding which candidates should represent the parties in November.

Iowa will hold what are known as caucuses, quite different from a primary.

CGTN's Gerald Tan explains.