Answer:
Nomination
Step-by-step explanation:
These people are trying to win their party's nomination. A nomination refers to the backing of their party that allows them to run as candidates. For any of them to be able to run as Republicans to represent their district in the House of Representatives, one of them needs to win, as each party has a candidate per district. They will compete for nomination in a primary, which is the first round of elections that happens within a political party.