After WWI and during the Great Depression the US tried to be an Isolationist nation. They put out tariffs so people would buy US (forgetting that the rest of the world was still devastated by WWI (economies included)).
President Wilson's "Peace without victory" idea formed a key part of the fourteen points B. hope this love.
Answer:
Labor unions did not allow Chinese immigrants to become members. Labor unions helped Chinese immigrants find jobs in mills and factories. Labor unions asked companies to pay Chinese immigrants low wages.
I hope this helps :)
