Are presidential primaries not held on the same day?

In 2024 there will be another presidential election, but states are already gearing up for those primaries.
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During primary season, each state and sometimes each party does its own thing.

Are presidential primaries not held on the same day?

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India Today - Missouri and Louisiana will hold presidential primaries Saturday, offering President Joe Biden and former President Donald Trump more chances to collect delegates. Read more: #Missouri #Louisiana #JoeBiden

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