How did the status of organized labor change between 1919 and 1929?

The labor history of the United States describes the history of organized labor, US labor law, and more general history of working people, in the United States. Beginning in the 1930s, unions became important allies of the Democratic Party. Some historians question why a Labor Party did not emerge in the United States, in contrast to Western Europe.[1]

The nature and power of organized labor is the outcome of historical tensions among counter-acting forces involving workplace rights, wages, working hours, political expression, labor laws, and other working conditions. Organized unions and their umbrella labor federations such as the AFL–CIO and citywide federations have competed, evolved, merged, and split against a backdrop of changing values and priorities, and periodic federal government intervention.

Explanation:

the answer is the government.