What is the main method that political Parties used to choose candidates for office? Who takes part in this process in most states?

individuals participate in primaries or caucuses to elect delegates who support their presidential candidate of choice. At national party conventions, the presidential contender with the most state delegate votes wins the party nomination. So basically thy use secret ballots to elect who they want or something like that

Explanation:

honestly you should get that checked out because it really isn't normal

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.