Federalism seeks so combine a strong national (federal) government with authority also granted to state or regional governments.
In the American government system, bicameralism--having a two-chamber legislature--expresses federalism in this way:
The Senate gives each state the same number of legislators -- two from each state. This points to the nation as a single governmental unit in which all states have equal authority.
The House of Representatives allots the number of legislators based on each state's population. So a large state, such as California, has 53 representatives (according to current numbers), whereas states with small populations, such as Delaware or Vermont, have only 1 representative each. This gives more populous states greater power in establishing national policy