How are the Republican and Democratic presidential candidates chosen?

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Explanation:

to become the Presidential nominee a candidate typically has to win a majority of delegates this usually happens to the party's primaries and cacauses it's been confirmed through a vote of the delegates at the National Convention

eastern europe, the region of europe that is east of germany, was heavily influenced by the byzantine empire. through byzantine traders, and more importantly, the church, byzantium influenced the art, literature, and architecture of the region