I was told that the United States is the only democratic type country to use election primaries where citizens can run to become a political party's nominee.
In the other countries, I think party insiders decide on the nominee.
Is that true?
If I understand correctly:
In the United States in 2016, Republican Party officials did not want Trump as the party's nominee for president but could not stop him;
In the United Kingdom, a person who wishes to run for a seat in Parliament would need the approval of the leaders of the party that he would be on.