The Louisville Courier-Journal has this clear story on the difference between British national elections and U.S. national elections. The story points out that there are no primary elections in Great Britain. The story might have added that the U.S. is the only nation in the world with government-administered primary elections to determine who is nominated by various political parties.
The United States does not administer any elections.
Louisiana, California, and Washington do not have government-administered primary elections to determine who is nominated by various political parties.