I’m not sure when you say U.S. but the Republicans supported the idea of state rights. (If you could clarify you question I could help more).
B. They left for California in hopes of starting a new life
This was a mixture of things.
The increase in population from soldiers and influx of immigrants caused the need for more food to be produced and more jobs to be demanded. So farmers started over producing which led to the Dust Bowl and, eventually, the Great Depression.
sherman act of 1890<span>
The Sherman Act outlaws "every contract, combination, or conspiracy in restraint of trade," and any "monopolization, attempted monopolization.</span>
<span>The antitrust act prohibits price fixing and other conspiracies and combinations that restrain trade and attempts to monopolize.</span>