Answer:
Because ww1 ended.
Explanation:
I don’t know. That makes the most sense to me.
They both are required to apply and enforce the laws.
The differences between the two are in the jurisdictions. The jurisdiction on federal court is not as elaborate as state courts.
In 1887, Congress established a commission to regulate the railroads by passing "The Interstate Commerce Act", which was mainly intended to keep railroad companies from becoming monopolies.