THE ANSWER IS RAILROADS!!
The two governments, support each other in a federal system. The system is that in which the governmental power is divided between the central government and the territorial subdivisions. The federal government refers to the national government of the US.
I don't think it influenced soccer since it is nature. Nature may influence steep roof-lines for a certain support.<span />
Economic depression coupled with extended drought, unusually high temperatures, poor agricultural practices and the resulting wind erosion all contributed to making the Dust Bowl.
Answer:
The simple answer would be by, "checks and balances", is how the two branches check upon each other. However there are specific methods in doing "checks and balances," hope this helps as a starting point to your question!